diff --git a/lib/config-win32.h b/lib/config-win32.h
index a464fbf5a9..0817ec5b12 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -247,7 +247,9 @@
 #define HAVE_SOCKET 1
 
 /* Define if you have the strcasecmp function. */
-/* #define HAVE_STRCASECMP 1 */
+#ifdef __MINGW32__
+#define HAVE_STRCASECMP 1
+#endif
 
 /* Define if you have the strdup function. */
 #define HAVE_STRDUP 1