diff --git a/include/SDL_stdinc.h b/include/SDL_stdinc.h
index 1854698b60..088e6444b8 100644
--- a/include/SDL_stdinc.h
+++ b/include/SDL_stdinc.h
@@ -565,6 +565,7 @@ SDL_FORCE_INLINE void SDL_memset4(void *dst, Uint32 val, size_t dwords)
         return;
     }
     switch (dwords % 4) {
+        default:
         case 0: do {    *_p++ = _val;   SDL_FALLTHROUGH;
         case 3:         *_p++ = _val;   SDL_FALLTHROUGH;
         case 2:         *_p++ = _val;   SDL_FALLTHROUGH;