diff --git a/src/SDL_hints.c b/src/SDL_hints.c
index 9440d0175..8aabb1926 100644
--- a/src/SDL_hints.c
+++ b/src/SDL_hints.c
@@ -105,7 +105,7 @@ SDL_GetHint(const char *name)
     return env;
 }
 
-void SDL_ClearHints()
+void SDL_ClearHints(void)
 {
     SDL_Hint *hint;