diff --git a/lib/dns/qpcache.c b/lib/dns/qpcache.c
index 81d293ef5b..b1bd1d7452 100644
--- a/lib/dns/qpcache.c
+++ b/lib/dns/qpcache.c
@@ -3459,6 +3459,11 @@ addrdataset(dns_db_t *db, dns_dbnode_t *node,
 		dns_qpread_destroy(qpdb->tree, &modctx.qpr);
 	}
 
+	if (cache_is_overmem) {
+		/* Trigger memory cleaning */
+		isc_loop_rcu_barrier(isc_loop());
+	}
+
 	return (result);
 }