diff --git a/ospfd/ospf_interface.h b/ospfd/ospf_interface.h
index ed6abed..60ee165 100644
--- a/ospfd/ospf_interface.h
+++ b/ospfd/ospf_interface.h
@@ -246,4 +246,6 @@
 void ospf_crypt_key_add (struct list *, struct crypt_key *);
 int ospf_crypt_key_delete (struct list *, u_char);
 
+u_char ospf_default_iftype(struct interface *ifp);
+
 #endif /* _ZEBRA_OSPF_INTERFACE_H */