diff --git a/ospfd/ospfd.h b/ospfd/ospfd.h
index c50e615..595c04f 100644
--- a/ospfd/ospfd.h
+++ b/ospfd/ospfd.h
@@ -563,6 +563,9 @@
 extern void ospf_area_add_if (struct ospf_area *, struct ospf_interface *);
 extern void ospf_area_del_if (struct ospf_area *, struct ospf_interface *);
 
+extern void ospf_interface_area_set (struct interface *);
+extern void ospf_interface_area_unset (struct interface *);
+
 extern void ospf_route_map_init (void);
 extern void ospf_snmp_init (void);