diff --git a/auth2-chall.c b/auth2-chall.c
index 031c282..4cfd8ff 100644
--- a/auth2-chall.c
+++ b/auth2-chall.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth2-chall.c,v 1.39 2013/11/08 00:39:14 djm Exp $ */
+/* $OpenBSD: auth2-chall.c,v 1.40 2014/01/31 16:39:19 tedu Exp $ */
 /*
  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  * Copyright (c) 2001 Per Allansson.  All rights reserved.
@@ -148,7 +148,7 @@
 	if (kbdintctxt->device)
 		kbdint_reset_device(kbdintctxt);
 	free(kbdintctxt->devices);
-	bzero(kbdintctxt, sizeof(*kbdintctxt));
+	explicit_bzero(kbdintctxt, sizeof(*kbdintctxt));
 	free(kbdintctxt);
 }
 /* get next device */