Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 350126)
+++ channels/chan_sip.c	(working copy)
@@ -13460,7 +13460,7 @@
 
 	if (!sip_cfg.ignore_regexpire) {
 		if (peer->rt_fromcontact && sip_cfg.peer_rtupdate) {
-			ast_update_realtime(tablename, "name", peer->name, "fullcontact", "", "ipaddr", "", "port", "", "regseconds", "0", "regserver", "", "useragent", "", "lastms", "", SENTINEL);
+			ast_update_realtime(tablename, "name", peer->name, "fullcontact", "", "ipaddr", "", "port", "", "regseconds", "0", "regserver", "", "useragent", "", "lastms", "-1", SENTINEL);
 		} else {
 			ast_db_del("SIP/Registry", peer->name);
 			ast_db_del("SIP/PeerMethods", peer->name);