diff --git a/ospfd/ospf_lsdb.h b/ospfd/ospf_lsdb.h
index 4157b68..51ae45b 100644
--- a/ospfd/ospf_lsdb.h
+++ b/ospfd/ospf_lsdb.h
@@ -66,6 +66,7 @@
 extern void ospf_lsdb_init (struct ospf_lsdb *);
 extern void ospf_lsdb_free (struct ospf_lsdb *);
 extern void ospf_lsdb_cleanup (struct ospf_lsdb *);
+extern void ls_prefix_set (struct prefix_ls *lp, struct ospf_lsa *lsa);
 extern void ospf_lsdb_add (struct ospf_lsdb *, struct ospf_lsa *);
 extern void ospf_lsdb_delete (struct ospf_lsdb *, struct ospf_lsa *);
 extern void ospf_lsdb_delete_all (struct ospf_lsdb *);