diff --git a/ospfd/ospf_vty.c b/ospfd/ospf_vty.c
index 59f03f5fc6..da80b0ab59 100644
--- a/ospfd/ospf_vty.c
+++ b/ospfd/ospf_vty.c
@@ -12168,6 +12168,10 @@ static int config_write_ospf_external_aggregator(struct vty *vty,
 {
 	struct route_node *rn;
 
+	if (ospf->aggr_delay_interval != OSPF_EXTL_AGGR_DEFAULT_DELAY)
+		vty_out(vty, " aggregation timer %u\n",
+			ospf->aggr_delay_interval);
+
 	/* print 'summary-address A.B.C.D/M' */
 	for (rn = route_top(ospf->rt_aggr_tbl); rn; rn = route_next(rn))
 		if (rn->info) {