diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 27e4d16..2f0c085 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -16,6 +16,7 @@
 #define NETLINK_AUDIT		9	/* auditing */
 #define NETLINK_FIB_LOOKUP	10	
 #define NETLINK_ROUTE6		11	/* af_inet6 route comm channel */
+#define NETLINK_NETFILTER	12	/* netfilter subsystem */
 #define NETLINK_IP6_FW		13
 #define NETLINK_DNRTMSG		14	/* DECnet routing messages */
 #define NETLINK_KOBJECT_UEVENT	15	/* Kernel messages to userspace */