diff --git a/src/gmtool.c b/src/gmtool.c
index 47b7794a2..608ad3c71 100644
--- a/src/gmtool.c
+++ b/src/gmtool.c
@@ -87,7 +87,7 @@ static void unicode_remove_diacritics(const char *rp, char *wp) {
     while (*rp) {
         if (gm_codepage >=0 && *rp & 0x80) {
             size_t sz = 0;
-            char ch;
+            unsigned char ch;
             switch (gm_codepage) {
             case 1252:
                 unicode_utf8_to_cp1252(&ch, rp, &sz);
@@ -100,7 +100,7 @@ static void unicode_remove_diacritics(const char *rp, char *wp) {
                 break;
             }
             rp += sz;
-            *wp++ = ch;
+            *wp++ = (char)ch;
         }
         else {
             *wp++ = *rp++;
diff --git a/src/util/log.c b/src/util/log.c
index f61d50848..d394aa20d 100644
--- a/src/util/log.c
+++ b/src/util/log.c
@@ -64,11 +64,11 @@ void log_destroy(log_t *handle) {
 #define LOG_MAXBACKUPS 5
 
 static int
-cp_convert(const char *format, char *buffer, size_t length, int codepage)
+cp_convert(const char *format, unsigned char *buffer, size_t length, int codepage)
 {
     /* when console output on MSDOS, convert to codepage */
     const char *input = format;
-    char *pos = buffer;
+    unsigned char *pos = buffer;
 
     while (pos + 1 < buffer + length && *input) {
         size_t size = 0;
@@ -157,10 +157,10 @@ static void _log_write(FILE * stream, int codepage, const char *format, va_list
 {
     if (codepage) {
         char buffer[MAXLENGTH];
-        char converted[MAXLENGTH];
+        unsigned char converted[MAXLENGTH];
         vsnprintf(buffer, sizeof(buffer), format, args);
         if (cp_convert(buffer, converted, MAXLENGTH, codepage) == 0) {
-            fputs(converted, stream);
+            fputs((char *)converted, stream);
         }
         else {
             /* fall back to non-converted output */
diff --git a/src/util/unicode.c b/src/util/unicode.c
index 94b6e3d5a..f7ea2653b 100644
--- a/src/util/unicode.c
+++ b/src/util/unicode.c
@@ -1,4 +1,4 @@
-/* 
+/*
  * +-------------------+  Christian Schlittchen <corwin@amber.kn-bremen.de>
  * |                   |  Enno Rehling <enno@eressea.de>
  * | Eressea PBEM host |  Katja Zedel <katze@felidae.kn-bremen.de>
@@ -71,7 +71,7 @@ int unicode_utf8_tolower(utf8_t * op, size_t outlen, const utf8_t * ip)
 
 int
 unicode_latin1_to_utf8(utf8_t * dst, size_t * outlen, const char *in,
-size_t * inlen)
+    size_t * inlen)
 {
     int is = (int)*inlen;
     int os = (int)*outlen;
@@ -104,7 +104,7 @@ size_t * inlen)
     return (int)*outlen;
 }
 
-int unicode_utf8_strcasecmp(const utf8_t * a, const char *b)
+int unicode_utf8_strcasecmp(const utf8_t * a, const utf8_t *b)
 {
     while (*a && *b) {
         int ret;
@@ -147,7 +147,7 @@ int unicode_utf8_strcasecmp(const utf8_t * a, const char *b)
 /* Convert a UCS-4 character to UTF-8. */
 int
 unicode_ucs4_to_utf8(utf8_t * utf8_character, size_t * size,
-ucs4_t ucs4_character)
+    ucs4_t ucs4_character)
 {
     int utf8_bytes;
 
@@ -214,7 +214,7 @@ ucs4_t ucs4_character)
 /* Convert a UTF-8 encoded character to UCS-4. */
 int
 unicode_utf8_to_ucs4(ucs4_t * ucs4_character, const utf8_t * utf8_string,
-size_t * length)
+    size_t * length)
 {
     utf8_t utf8_character = utf8_string[0];
 
@@ -317,8 +317,8 @@ size_t * length)
 
 /** Convert a UTF-8 encoded character to CP437. */
 int
-unicode_utf8_to_cp437(char *cp_character, const utf8_t * utf8_string,
-size_t * length)
+unicode_utf8_to_cp437(unsigned char *cp_character, const utf8_t * utf8_string,
+    size_t * length)
 {
     ucs4_t ucs4_character;
     int result;
@@ -330,174 +330,173 @@ size_t * length)
     }
 
     if (ucs4_character < 0x7F) {
-        *cp_character = (char)ucs4_character;
+        *cp_character = (unsigned char)ucs4_character;
     }
     else {
         struct {
             ucs4_t ucs4;
             unsigned char cp437;
         } xref[160] = {
-            {
-                0x00A0, 255 }, {
-                    0x00A1, 173 }, {
-                        0x00A2, 155 }, {
-                            0x00A3, 156 }, {
-                                0x00A5, 157 }, {
-                                    0x00A7, 21 }, {
-                                        0x00AA, 166 }, {
-                                            0x00AB, 174 }, {
-                                                0x00AC, 170 }, {
-                                                    0x00B0, 248 }, {
-                                                        0x00B1, 241 }, {
-                                                            0x00B2, 253 }, {
-                                                                0x00B5, 230 }, {
-                                                                    0x00B6, 20 }, {
-                                                                        0x00B7, 250 }, {
-                                                                            0x00BA, 167 }, {
-                                                                                0x00BB, 175 }, {
-                                                                                    0x00BC, 172 }, {
-                                                                                        0x00BD, 171 }, {
-                                                                                            0x00BF, 168 }, {
-                                                                                                0x00C4, 142 }, {
-                                                                                                    0x00C5, 143 }, {
-                                                                                                        0x00C6, 146 }, {
-                                                                                                            0x00C7, 128 }, {
-                                                                                                                0x00C9, 144 }, {
-                                                                                                                    0x00D1, 165 }, {
-                                                                                                                        0x00D6, 153 }, {
-                                                                                                                            0x00DC, 154 }, {
-                                                                                                                                0x00DF, 225 }, {
-                                                                                                                                    0x00E0, 133 }, {
-                                                                                                                                        0x00E1, 160 }, {
-                                                                                                                                            0x00E2, 131 }, {
-                                                                                                                                                0x00E4, 132 }, {
-                                                                                                                                                    0x00E5, 134 }, {
-                                                                                                                                                        0x00E6, 145 }, {
-                                                                                                                                                            0x00E7, 135 }, {
-                                                                                                                                                                0x00E8, 138 }, {
-                                                                                                                                                                    0x00E9, 130 }, {
-                                                                                                                                                                        0x00EA, 136 }, {
-                                                                                                                                                                            0x00EB, 137 }, {
-                                                                                                                                                                                0x00EC, 141 }, {
-                                                                                                                                                                                    0x00ED, 161 }, {
-                                                                                                                                                                                        0x00EE, 140 }, {
-                                                                                                                                                                                            0x00EF, 139 }, {
-                                                                                                                                                                                                0x00F1, 164 }, {
-                                                                                                                                                                                                    0x00F2, 149 }, {
-                                                                                                                                                                                                        0x00F3, 162 }, {
-                                                                                                                                                                                                            0x00F4, 147 }, {
-                                                                                                                                                                                                                0x00F6, 148 }, {
-                                                                                                                                                                                                                    0x00F7, 246 }, {
-                                                                                                                                                                                                                        0x00F9, 151 }, {
-                                                                                                                                                                                                                            0x00FA, 163 }, {
-                                                                                                                                                                                                                                0x00FB, 150 }, {
-                                                                                                                                                                                                                                    0x00FC, 129 }, {
-                                                                                                                                                                                                                                        0x00FF, 152 }, {
-                                                                                                                                                                                                                                            0x0192, 159 }, {
-                                                                                                                                                                                                                                                0x0393, 226 }, {
-                                                                                                                                                                                                                                                    0x0398, 233 }, {
-                                                                                                                                                                                                                                                        0x03A3, 228 }, {
-                                                                                                                                                                                                                                                            0x03A6, 232 }, {
-                                                                                                                                                                                                                                                                0x03A9, 234 }, {
-                                                                                                                                                                                                                                                                    0x03B1, 224 }, {
-                                                                                                                                                                                                                                                                        0x03B4, 235 }, {
-                                                                                                                                                                                                                                                                            0x03B5, 238 }, {
-                                                                                                                                                                                                                                                                                0x03C0, 227 }, {
-                                                                                                                                                                                                                                                                                    0x03C3, 229 }, {
-                                                                                                                                                                                                                                                                                        0x03C4, 231 }, {
-                                                                                                                                                                                                                                                                                            0x03C6, 237 }, {
-                                                                                                                                                                                                                                                                                                0x2022, 7 }, {
-                                                                                                                                                                                                                                                                                                    0x203C, 19 }, {
-                                                                                                                                                                                                                                                                                                        0x207F, 252 }, {
-                                                                                                                                                                                                                                                                                                            0x20A7, 158 }, {
-                                                                                                                                                                                                                                                                                                                0x2190, 27 }, {
-                                                                                                                                                                                                                                                                                                                    0x2191, 24 }, {
-                                                                                                                                                                                                                                                                                                                        0x2192, 26 }, {
-                                                                                                                                                                                                                                                                                                                            0x2193, 25 }, {
-                                                                                                                                                                                                                                                                                                                                0x2194, 29 }, {
-                                                                                                                                                                                                                                                                                                                                    0x2195, 18 }, {
-                                                                                                                                                                                                                                                                                                                                        0x21A8, 23 }, {
-                                                                                                                                                                                                                                                                                                                                            0x2219, 249 }, {
-                                                                                                                                                                                                                                                                                                                                                0x221A, 251 }, {
-                                                                                                                                                                                                                                                                                                                                                    0x221E, 236 }, {
-                                                                                                                                                                                                                                                                                                                                                        0x221F, 28 }, {
-                                                                                                                                                                                                                                                                                                                                                            0x2229, 239 }, {
-                                                                                                                                                                                                                                                                                                                                                                0x2248, 247 }, {
-                                                                                                                                                                                                                                                                                                                                                                    0x2261, 240 }, {
-                                                                                                                                                                                                                                                                                                                                                                        0x2264, 243 }, {
-                                                                                                                                                                                                                                                                                                                                                                            0x2265, 242 }, {
-                                                                                                                                                                                                                                                                                                                                                                                0x2302, 127 }, {
-                                                                                                                                                                                                                                                                                                                                                                                    0x2310, 169 }, {
-                                                                                                                                                                                                                                                                                                                                                                                        0x2320, 244 }, {
-                                                                                                                                                                                                                                                                                                                                                                                            0x2321, 245 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                0x2500, 196 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                    0x2502, 179 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                        0x250C, 218 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                            0x2510, 191 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                0x2514, 192 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                    0x2518, 217 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                        0x251C, 195 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                            0x2524, 180 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                0x252C, 194 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2534, 193 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                        0x253C, 197 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2550, 205 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2551, 186 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2552, 213 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2553, 214 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2554, 201 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2555, 184 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2556, 183 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2557, 187 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2558, 212 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2559, 211 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x255A, 200 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x255B, 190 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x255C, 189 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x255D, 188 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x255E, 198 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x255F, 199 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2560, 204 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2561, 181 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2562, 182 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2563, 185 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2564, 209 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2565, 210 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2566, 203 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2567, 207 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2568, 208 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2569, 202 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x256A, 216 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x256B, 215 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x256C, 206 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2580, 223 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2584, 220 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2588, 219 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x258C, 221 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2590, 222 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2591, 176 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2592, 177 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2593, 178 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x25A0, 254 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x25AC, 22 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x25B2, 30 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x25BA, 16 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x25BC, 31 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x25C4, 17 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x25CB, 9 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x25D8, 8 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x25D9, 10 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x263A, 1 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x263B, 2 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x263C, 15 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2640, 12 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2642, 11 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x2660, 6 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x2663, 5 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0x2665, 3 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    0x2666, 4 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        0x266A, 13 }, {
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            0x266B, 14 }
+            { 0x00A0, 255 },
+            { 0x00A1, 173 },
+            { 0x00A2, 155 },
+            { 0x00A3, 156 },
+            { 0x00A5, 157 },
+            { 0x00A7, 21 },
+            { 0x00AA, 166 },
+            { 0x00AB, 174 },
+            { 0x00AC, 170 },
+            { 0x00B0, 248 },
+            { 0x00B1, 241 },
+            { 0x00B2, 253 },
+            { 0x00B5, 230 },
+            { 0x00B6, 20 },
+            { 0x00B7, 250 },
+            { 0x00BA, 167 },
+            { 0x00BB, 175 },
+            { 0x00BC, 172 },
+            { 0x00BD, 171 },
+            { 0x00BF, 168 },
+            { 0x00C4, 142 },
+            { 0x00C5, 143 },
+            { 0x00C6, 146 },
+            { 0x00C7, 128 },
+            { 0x00C9, 144 },
+            { 0x00D1, 165 },
+            { 0x00D6, 153 },
+            { 0x00DC, 154 },
+            { 0x00DF, 225 },
+            { 0x00E0, 133 },
+            { 0x00E1, 160 },
+            { 0x00E2, 131 },
+            { 0x00E4, 132 },
+            { 0x00E5, 134 },
+            { 0x00E6, 145 },
+            { 0x00E7, 135 },
+            { 0x00E8, 138 },
+            { 0x00E9, 130 },
+            { 0x00EA, 136 },
+            { 0x00EB, 137 },
+            { 0x00EC, 141 },
+            { 0x00ED, 161 },
+            { 0x00EE, 140 },
+            { 0x00EF, 139 },
+            { 0x00F1, 164 },
+            { 0x00F2, 149 },
+            { 0x00F3, 162 },
+            { 0x00F4, 147 },
+            { 0x00F6, 148 },
+            { 0x00F7, 246 },
+            { 0x00F9, 151 },
+            { 0x00FA, 163 },
+            { 0x00FB, 150 },
+            { 0x00FC, 129 },
+            { 0x00FF, 152 },
+            { 0x0192, 159 },
+            { 0x0393, 226 },
+            { 0x0398, 233 },
+            { 0x03A3, 228 },
+            { 0x03A6, 232 },
+            { 0x03A9, 234 },
+            { 0x03B1, 224 },
+            { 0x03B4, 235 },
+            { 0x03B5, 238 },
+            { 0x03C0, 227 },
+            { 0x03C3, 229 },
+            { 0x03C4, 231 },
+            { 0x03C6, 237 },
+            { 0x2022, 7 },
+            { 0x203C, 19 },
+            { 0x207F, 252 },
+            { 0x20A7, 158 },
+            { 0x2190, 27 },
+            { 0x2191, 24 },
+            { 0x2192, 26 },
+            { 0x2193, 25 },
+            { 0x2194, 29 },
+            { 0x2195, 18 },
+            { 0x21A8, 23 },
+            { 0x2219, 249 },
+            { 0x221A, 251 },
+            { 0x221E, 236 },
+            { 0x221F, 28 },
+            { 0x2229, 239 },
+            { 0x2248, 247 },
+            { 0x2261, 240 },
+            { 0x2264, 243 },
+            { 0x2265, 242 },
+            { 0x2302, 127 },
+            { 0x2310, 169 },
+            { 0x2320, 244 },
+            { 0x2321, 245 },
+            { 0x2500, 196 },
+            { 0x2502, 179 },
+            { 0x250C, 218 },
+            { 0x2510, 191 },
+            { 0x2514, 192 },
+            { 0x2518, 217 },
+            { 0x251C, 195 },
+            { 0x2524, 180 },
+            { 0x252C, 194 },
+            { 0x2534, 193 },
+            { 0x253C, 197 },
+            { 0x2550, 205 },
+            { 0x2551, 186 },
+            { 0x2552, 213 },
+            { 0x2553, 214 },
+            { 0x2554, 201 },
+            { 0x2555, 184 },
+            { 0x2556, 183 },
+            { 0x2557, 187 },
+            { 0x2558, 212 },
+            { 0x2559, 211 },
+            { 0x255A, 200 },
+            { 0x255B, 190 },
+            { 0x255C, 189 },
+            { 0x255D, 188 },
+            { 0x255E, 198 },
+            { 0x255F, 199 },
+            { 0x2560, 204 },
+            { 0x2561, 181 },
+            { 0x2562, 182 },
+            { 0x2563, 185 },
+            { 0x2564, 209 },
+            { 0x2565, 210 },
+            { 0x2566, 203 },
+            { 0x2567, 207 },
+            { 0x2568, 208 },
+            { 0x2569, 202 },
+            { 0x256A, 216 },
+            { 0x256B, 215 },
+            { 0x256C, 206 },
+            { 0x2580, 223 },
+            { 0x2584, 220 },
+            { 0x2588, 219 },
+            { 0x258C, 221 },
+            { 0x2590, 222 },
+            { 0x2591, 176 },
+            { 0x2592, 177 },
+            { 0x2593, 178 },
+            { 0x25A0, 254 },
+            { 0x25AC, 22 },
+            { 0x25B2, 30 },
+            { 0x25BA, 16 },
+            { 0x25BC, 31 },
+            { 0x25C4, 17 },
+            { 0x25CB, 9 },
+            { 0x25D8, 8 },
+            { 0x25D9, 10 },
+            { 0x263A, 1 },
+            { 0x263B, 2 },
+            { 0x263C, 15 },
+            { 0x2640, 12 },
+            { 0x2642, 11 },
+            { 0x2660, 6 },
+            { 0x2663, 5 },
+            { 0x2665, 3 },
+            { 0x2666, 4 },
+            { 0x266A, 13 },
+            { 0x266B, 14 }
         };
         int l = 0, r = 160;
         while (l != r) {
@@ -506,10 +505,14 @@ size_t * length)
                 *cp_character = (char)xref[m].cp437;
                 break;
             }
-            else if (xref[m].ucs4 < ucs4_character)
-                l = m;
-            else
-                r = m;
+            else if (xref[m].ucs4 < ucs4_character) {
+                if (l == m) l = r;
+                else l = m;
+            }
+            else {
+                if (r == m) r = l;
+                else r = m;
+            }
         }
         if (l == r) {
             *cp_character = '?';
@@ -519,7 +522,7 @@ size_t * length)
 }
 
 /** Convert a UTF-8 encoded character to ASCII, with '?' replacements. */
-int unicode_utf8_to_ascii(char *cp_character, const utf8_t * utf8_string,
+int unicode_utf8_to_ascii(unsigned char *cp_character, const utf8_t * utf8_string,
     size_t *length)
 {
     int result = unicode_utf8_to_cp437(cp_character, utf8_string, length);
@@ -532,7 +535,7 @@ int unicode_utf8_to_ascii(char *cp_character, const utf8_t * utf8_string,
 }
 
 /** Convert a UTF-8 encoded character to CP1252. */
-int unicode_utf8_to_cp1252(char *cp_character, const utf8_t * utf8_string,
+int unicode_utf8_to_cp1252(unsigned char *cp_character, const utf8_t * utf8_string,
     size_t * length)
 {
     ucs4_t ucs4_character;
@@ -552,39 +555,38 @@ int unicode_utf8_to_cp1252(char *cp_character, const utf8_t * utf8_string,
             ucs4_t ucs4;
             unsigned char cp;
         } xref[] = {
-            {
-                0x20ac, 0x80 }, {
-                    0x0081, 0x81 }, {
-                        0x201a, 0x82 }, {
-                            0x0192, 0x83 }, {
-                                0x201e, 0x84 }, {
-                                    0x2026, 0x85 }, {
-                                        0x2020, 0x86 }, {
-                                            0x2021, 0x87 }, {
-                                                0x02c6, 0x88 }, {
-                                                    0x2030, 0x89 }, {
-                                                        0x0160, 0x8a }, {
-                                                            0x2039, 0x8b }, {
-                                                                0x0152, 0x8c }, {
-                                                                    0x008d, 0x8d }, {
-                                                                        0x017d, 0x8e }, {
-                                                                            0x008f, 0x8f }, {
-                                                                                0x0090, 0x90 }, {
-                                                                                    0x2018, 0x91 }, {
-                                                                                        0x2019, 0x92 }, {
-                                                                                            0x201c, 0x93 }, {
-                                                                                                0x201d, 0x94 }, {
-                                                                                                    0x2022, 0x95 }, {
-                                                                                                        0x2013, 0x96 }, {
-                                                                                                            0x2014, 0x97 }, {
-                                                                                                                0x02dc, 0x98 }, {
-                                                                                                                    0x2122, 0x99 }, {
-                                                                                                                        0x0161, 0x9a }, {
-                                                                                                                            0x203a, 0x9b }, {
-                                                                                                                                0x0153, 0x9c }, {
-                                                                                                                                    0x009d, 0x9d }, {
-                                                                                                                                        0x017e, 0x9e }, {
-                                                                                                                                            0x0178, 0x9f }
+            { 0x0081, 0x81 },
+            { 0x008d, 0x8d },
+            { 0x008f, 0x8f },
+            { 0x0090, 0x90 },
+            { 0x009d, 0x9d },
+            { 0x0152, 0x8c },
+            { 0x0153, 0x9c },
+            { 0x0160, 0x8a },
+            { 0x0161, 0x9a },
+            { 0x0178, 0x9f },
+            { 0x017d, 0x8e },
+            { 0x017e, 0x9e },
+            { 0x0192, 0x83 },
+            { 0x02c6, 0x88 },
+            { 0x02dc, 0x98 },
+            { 0x2013, 0x96 },
+            { 0x2014, 0x97 },
+            { 0x2018, 0x91 },
+            { 0x2019, 0x92 },
+            { 0x201a, 0x82 },
+            { 0x201c, 0x93 },
+            { 0x201d, 0x94 },
+            { 0x201e, 0x84 },
+            { 0x2022, 0x95 },
+            { 0x2026, 0x85 },
+            { 0x2020, 0x86 },
+            { 0x2021, 0x87 },
+            { 0x2030, 0x89 },
+            { 0x203a, 0x9b },
+            { 0x2039, 0x8b },
+            { 0x20ac, 0x80 },
+            { 0x2122, 0x99 }
         };
         int l = 0, r = sizeof(xref) / sizeof(xref[0]);
         while (l != r) {
diff --git a/src/util/unicode.h b/src/util/unicode.h
index b061cd6fb..df68ade02 100644
--- a/src/util/unicode.h
+++ b/src/util/unicode.h
@@ -28,15 +28,15 @@ extern "C" {
     typedef unsigned long ucs4_t;
     typedef char utf8_t;
 
-    int unicode_utf8_to_cp437(char *result, const utf8_t * utf8_string,
+    int unicode_utf8_to_cp437(unsigned char *result, const utf8_t * utf8_string,
         size_t * length);
-    int unicode_utf8_to_cp1252(char *result, const utf8_t * utf8_string,
+    int unicode_utf8_to_cp1252(unsigned char *result, const utf8_t * utf8_string,
         size_t * length);
     int unicode_utf8_to_ucs4(ucs4_t * result, const utf8_t * utf8_string,
         size_t * length);
     int unicode_ucs4_to_utf8(utf8_t * result, size_t * size,
         ucs4_t ucs4_character);
-    int unicode_utf8_to_ascii(char *cp_character, const utf8_t * utf8_string,
+    int unicode_utf8_to_ascii(unsigned char *cp_character, const utf8_t * utf8_string,
         size_t *length);
     int unicode_utf8_strcasecmp(const utf8_t * a, const utf8_t * b);
     int unicode_latin1_to_utf8(utf8_t * out, size_t * outlen,
diff --git a/src/util/unicode.test.c b/src/util/unicode.test.c
index 958b695e2..f485808cb 100644
--- a/src/util/unicode.test.c
+++ b/src/util/unicode.test.c
@@ -16,9 +16,56 @@ static void test_unicode_tolower(CuTest * tc)
     CuAssertStrEquals(tc, "helloX", buffer);
 }
 
+static void test_unicode_utf8_to_other(CuTest *tc)
+{
+    const unsigned char uchar_str[] = { 0xc3, 0x98, 0xc5, 0xb8, 0xc2, 0x9d, 'l', 0 }; // &Oslash;&Yuml;&#157;l
+    utf8_t *utf8_str = (utf8_t *)uchar_str;
+    unsigned char ch;
+    size_t sz;
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp437(&ch, utf8_str, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, '?', ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp437(&ch, utf8_str+2, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, '?', ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp437(&ch, utf8_str+4, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, '?', ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp437(&ch, utf8_str + 6, &sz));
+    CuAssertIntEquals(tc, 1, sz);
+    CuAssertIntEquals(tc, 'l', ch);
+
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp1252(&ch, utf8_str, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, 216, ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp1252(&ch, utf8_str+2, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, 120, ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp1252(&ch, utf8_str + 4, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, 0x9d, ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_cp1252(&ch, utf8_str + 6, &sz));
+    CuAssertIntEquals(tc, 1, sz);
+    CuAssertIntEquals(tc, 'l', ch);
+
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_ascii(&ch, utf8_str, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, '?', ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_ascii(&ch, utf8_str + 2, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, '?', ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_ascii(&ch, utf8_str + 4, &sz));
+    CuAssertIntEquals(tc, 2, sz);
+    CuAssertIntEquals(tc, '?', ch);
+    CuAssertIntEquals(tc, 0, unicode_utf8_to_ascii(&ch, utf8_str + 6, &sz));
+    CuAssertIntEquals(tc, 1, sz);
+    CuAssertIntEquals(tc, 'l', ch);
+}
+
 CuSuite *get_unicode_suite(void)
 {
     CuSuite *suite = CuSuiteNew();
     SUITE_ADD_TEST(suite, test_unicode_tolower);
+    SUITE_ADD_TEST(suite, test_unicode_utf8_to_other);
     return suite;
 }