1 files changed, 3 insertions, 1 deletions

diff --git a/hmac.c b/hmac.c
index 1c879640c..32688876d 100644
--- a/hmac.c
+++ b/hmac.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: hmac.c,v 1.12 2015/03/24 20:03:44 markus Exp $ */
+/* $OpenBSD: hmac.c,v 1.13 2019/09/06 04:53:27 djm Exp $ */
 /*
  * Copyright (c) 2014 Markus Friedl.  All rights reserved.
  *
@@ -18,6 +18,8 @@
 #include "includes.h"
 
 #include <sys/types.h>
+
+#include <stdlib.h>
 #include <string.h>
 
 #include "sshbuf.h"