diff --git a/ospfd/ospf_interface.h b/ospfd/ospf_interface.h
index 79b178d..0fc4ccb 100644
--- a/ospfd/ospf_interface.h
+++ b/ospfd/ospf_interface.h
@@ -248,6 +248,8 @@
 							    struct in_addr);
 extern struct ospf_interface *ospf_if_lookup_by_prefix (struct ospf *,
 							struct prefix_ipv4 *);
+extern struct ospf_interface *ospf_if_table_lookup (struct interface *,
+						    struct prefix *);
 extern struct ospf_interface *ospf_if_addr_local (struct in_addr);
 extern struct ospf_interface *ospf_if_lookup_recv_if (struct ospf *,
 						      struct in_addr);