diff -Naur knock-0.5/src/knockd.c knock-0.5-new/src/knockd.c
--- knock-0.5/src/knockd.c	2005-06-27 08:11:34.000000000 +0300
+++ knock-0.5-new/src/knockd.c	2012-07-31 22:49:13.670323836 +0300
@@ -46,6 +46,7 @@
 #include <syslog.h>
 #include <pcap.h>
 #include <errno.h>
+#include <limits.h> /* PATH_MAX in eglibc env */
 #include "list.h"

 static char version[] = "0.5";