diff --git a/hostfile.c b/hostfile.c
index 91741ca..ee2daf4 100644
--- a/hostfile.c
+++ b/hostfile.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: hostfile.c,v 1.56 2014/04/29 18:01:49 markus Exp $ */
+/* $OpenBSD: hostfile.c,v 1.57 2014/06/24 01:13:21 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -47,6 +47,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdarg.h>
 
 #include "xmalloc.h"
 #include "match.h"