diff --git a/src/mesa/main/texcompress_s3tc.c b/src/mesa/main/texcompress_s3tc.c
index 3ccc8a8df75..65ecaba3a30 100644
--- a/src/mesa/main/texcompress_s3tc.c
+++ b/src/mesa/main/texcompress_s3tc.c
@@ -89,7 +89,7 @@ _mesa_dlopen(const char *libname, int flags)
    return dlopen(libname, flags);
 #endif
 #else
-   return (GenericFunc) NULL;
+   return (void *) NULL;
 #endif /* USE_EXTERNAL_DXTN_LIB */
 }