diff --git a/src/gui_mac.c b/src/gui_mac.c
index 9112c56..8859857 100644
--- a/src/gui_mac.c
+++ b/src/gui_mac.c
@@ -5654,7 +5654,7 @@
     button = 0;
 
     /* initialize the hotkey mapping */
-    memset(hotKeys, 0, sizeof(hotKeys));
+    vim_memset(hotKeys, 0, sizeof(hotKeys));
 
     for (;*buttonChar != 0;)
     {