diff --git a/net/knock/patches/010_eglibc_define_PATH_MAX.patch b/net/knock/patches/010_eglibc_define_PATH_MAX.patch
new file mode 100644
index 000000000..0e7f56ef8
--- /dev/null
+++ b/net/knock/patches/010_eglibc_define_PATH_MAX.patch
@@ -0,0 +1,11 @@
+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";