diff --git a/nest/iface.h b/nest/iface.h
index e8e4e733..8540a4de 100644
--- a/nest/iface.h
+++ b/nest/iface.h
@@ -121,6 +121,8 @@ void neigh_if_up(struct iface *);
 void neigh_if_down(struct iface *);
 void neigh_init(struct pool *);
 
+extern int if_connected(ip_addr *a, struct iface *i) /* -1=error, 1=match, 0=no match */
+
 /*
  *	Interface Pattern Lists
  */
diff --git a/nest/neighbor.c b/nest/neighbor.c
index c4328b6c..5750f8cf 100644
--- a/nest/neighbor.c
+++ b/nest/neighbor.c
@@ -24,7 +24,7 @@ neigh_hash(struct proto *p, ip_addr *a)
   return (p->hash_key ^ ipa_hash(*a)) & (NEIGH_HASH_SIZE-1);
 }
 
-static int
+int
 if_connected(ip_addr *a, struct iface *i) /* -1=error, 1=match, 0=no match */
 {
   struct ifa *b;