diff --git a/bin/named/client.c b/bin/named/client.c
index e716eb278c..b6fb755b5a 100644
--- a/bin/named/client.c
+++ b/bin/named/client.c
@@ -591,7 +591,7 @@ client_request(isc_task_t *task, isc_event_t *event) {
 		break;
 	case dns_opcode_iquery:
 		CTRACE("iquery");
-		ns_client_error(client, DNS_R_REFUSED);
+		ns_client_error(client, DNS_R_NOTIMP);
 	default:
 		CTRACE("unknown opcode");
 		ns_client_error(client, DNS_R_NOTIMP);