diff --git a/src/build.h b/src/build.h
index 7eb5647df..1ab97b086 100644
--- a/src/build.h
+++ b/src/build.h
@@ -1,3 +1,3 @@
 #define VERSION_MAJOR 3
 #define VERSION_MINOR 3
-#define VERSION_BUILD 688
+#define VERSION_BUILD 689
diff --git a/src/kernel/magic.c b/src/kernel/magic.c
index b609fcff6..ddd53acb0 100644
--- a/src/kernel/magic.c
+++ b/src/kernel/magic.c
@@ -2579,7 +2579,7 @@ static castorder *cast_cmd(unit * u, order * ord)
         }
         s = getstrtoken();
     }
-    if (!s[0] || strlen(s) == 0) {
+    if (!s || !s[0] || strlen(s) == 0) {
         /* Fehler "Es wurde kein Zauber angegeben" */
         cmistake(u, ord, 172, MSG_MAGIC);
         return 0;