diff --git a/ospfd/ospf_abr.c b/ospfd/ospf_abr.c
index f6c0504999..40a1ed3a8a 100644
--- a/ospfd/ospf_abr.c
+++ b/ospfd/ospf_abr.c
@@ -1153,6 +1153,15 @@ static void ospf_abr_announce_rtr(struct ospf *ospf, struct prefix_ipv4 *p,
 		if (ospf_abr_nexthops_belong_to_area(or, area))
 			continue;
 
+		/* RFC3101: Do not generate ASBR type 4 LSA if NSSA ABR */
+		if (or->u.std.external_routing == OSPF_AREA_NSSA) {
+			if (IS_DEBUG_OSPF_EVENT)
+				zlog_debug(
+					"ospf_abr_announce_rtr(): do not generate LSA Type-4 %s from NSSA",
+					inet_ntoa(p->prefix));
+			continue;
+		}
+
 		if (area->external_routing != OSPF_AREA_DEFAULT) {
 			if (IS_DEBUG_OSPF_EVENT)
 				zlog_debug(