--- src/knockd.c.orig	2008-12-03 07:21:14.643255773 +0000
+++ src/knockd.c	2008-12-03 07:24:59.606701396 +0000
@@ -46,6 +46,7 @@
 #include <syslog.h>
 #include <pcap.h>
 #include <errno.h>
+#include <limits.h>
 #include "list.h"
 
 static char version[] = "0.5";