diff --git a/ssh-agent.c b/ssh-agent.c
index 4421fa4..621b097 100644
--- a/ssh-agent.c
+++ b/ssh-agent.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-agent.c,v 1.143 2006/07/11 20:07:25 stevesk Exp $ */
+/* $OpenBSD: ssh-agent.c,v 1.144 2006/07/17 01:31:10 stevesk Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -51,6 +51,7 @@
 # include <paths.h>
 #endif
 #include <signal.h>
+#include <unistd.h>
 
 #include <openssl/evp.h>
 #include <openssl/md5.h>