diff --git a/Modules/CheckIPOSupported/main.c b/Modules/CheckIPOSupported/main.c
index 5be0864eee..8d2ab01cb9 100644
--- a/Modules/CheckIPOSupported/main.c
+++ b/Modules/CheckIPOSupported/main.c
@@ -1,6 +1,6 @@
 int foo();
 
-int main()
+int main(void)
 {
   return foo();
 }