diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 41b1ce6..4c09bd2 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -252,6 +252,7 @@
 void neigh_destroy(struct neighbour *neigh);
 int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb);
 int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, u32 flags);
+void __neigh_set_probe_once(struct neighbour *neigh);
 void neigh_changeaddr(struct neigh_table *tbl, struct net_device *dev);
 int neigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
 int neigh_resolve_output(struct neighbour *neigh, struct sk_buff *skb);