diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index b176978..495bc57 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -118,6 +118,7 @@
 	struct netns_ipvs	*ipvs;
 	struct sock		*diag_nlsk;
 	atomic_t		rt_genid;
+	atomic_t		fnhe_genid;
 };
 
 /*
@@ -340,4 +341,14 @@
 	atomic_inc(&net->rt_genid);
 }
 
+static inline int fnhe_genid(struct net *net)
+{
+	return atomic_read(&net->fnhe_genid);
+}
+
+static inline void fnhe_genid_bump(struct net *net)
+{
+	atomic_inc(&net->fnhe_genid);
+}
+
 #endif /* __NET_NET_NAMESPACE_H */