diff --git a/src/util/log.c b/src/util/log.c
index 5d95d0ea7..2a7e41831 100644
--- a/src/util/log.c
+++ b/src/util/log.c
@@ -11,6 +11,8 @@ without prior permission by the authors of Eressea.
 */
 #include <platform.h>
 #include "log.h"
+
+#include "bsdstring.h"
 #include "unicode.h"
 
 #include <assert.h>