diff --git a/src/prim/osx/alloc-override-zone.c b/src/prim/osx/alloc-override-zone.c
index a517ddea..80bcfa93 100644
--- a/src/prim/osx/alloc-override-zone.c
+++ b/src/prim/osx/alloc-override-zone.c
@@ -420,7 +420,7 @@ __attribute__((constructor(0)))
 #else
 __attribute__((constructor))      // seems not supported by g++-11 on the M1
 #endif
-static void _mi_macos_override_malloc() {
+static void _mi_macos_override_malloc(void) {
   malloc_zone_t* purgeable_zone = NULL;
 
   #if defined(MAC_OS_X_VERSION_10_6) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6)