diff --git a/src/hlr.h b/src/hlr.h
index 315c3dd..e9cc747 100644
--- a/src/hlr.h
+++ b/src/hlr.h
@@ -45,6 +45,9 @@
 	struct hlr_euse *euse_default;
 	struct llist_head iuse_list;
 
+	/* NCSS (call independent) session guard timeout value */
+	int ncss_guard_timeout;
+
 	struct llist_head ussd_routes;
 
 	struct llist_head ss_sessions;