diff --git a/ospfd/ospf_lsa.h b/ospfd/ospf_lsa.h
index dd3b91a..c940724 100644
--- a/ospfd/ospf_lsa.h
+++ b/ospfd/ospf_lsa.h
@@ -283,7 +283,7 @@
 
 extern void ospf_nssa_lsa_flush (struct ospf *ospf, struct prefix_ipv4 *p);
 extern void ospf_external_lsa_flush (struct ospf *, u_char, struct prefix_ipv4 *,
-			      unsigned int /* , struct in_addr nexthop */);
+			             ifindex_t /* , struct in_addr nexthop */);
 
 extern struct in_addr ospf_get_ip_from_ifp (struct ospf_interface *);