diff --git a/vm/pc/keybd.c b/vm/pc/keybd.c
index cc21e40..45c87c4 100644
--- a/vm/pc/keybd.c
+++ b/vm/pc/keybd.c
@@ -39,7 +39,7 @@ keycode_t console_scankeybuf(void)
 
 void console_flushkeybuf(void)
 {
-    memset(keybuf, 0, KEYBUFSIZE);
+    memset(keybuf, 0, KEYBUFSIZE * sizeof(keycode_t));
     keybuf_last = keybuf_ptr = &keybuf[0];
 }