$OpenBSD: patch-update_c,v 1.1 2009/10/01 14:09:55 sthen Exp $
--- update.c.orig	Thu Oct  1 13:18:59 2009
+++ update.c	Thu Oct  1 13:19:05 2009
@@ -8,6 +8,7 @@
 
 #include "cnagios.h"
 #include <signal.h>
+#include <unistd.h>
 
 extern int need_swipe;
 extern int polling_interval;
