diff --git a/include/SDL_config_macosx.h b/include/SDL_config_macosx.h
index f29209ae9..255ab194e 100644
--- a/include/SDL_config_macosx.h
+++ b/include/SDL_config_macosx.h
@@ -72,6 +72,7 @@
 #define HAVE_STRCMP	1
 #define HAVE_STRNCMP	1
 #define HAVE_STRCASECMP	1
+#define HAVE_STRNCASECMP 1
 #define HAVE_SSCANF	1
 #define HAVE_SNPRINTF	1
 #define HAVE_VSNPRINTF	1