diff --git a/test/testmouse.c b/test/testmouse.c
index f4cb1338e0..65e7a3b8f6 100644
--- a/test/testmouse.c
+++ b/test/testmouse.c
@@ -74,9 +74,8 @@ AppendLine(Line *line)
 }
 
 void
-loop()
+loop(void)
 {
-    int i;
     SDL_Event event;
 
     /* Check for events */