--- source4/dns_server/dns_server.c.orig	2017-07-04 12:05:26.000000000 +0200
+++ source4/dns_server/dns_server.c	2019-10-05 16:44:55.000000000 +0200
@@ -215,13 +215,15 @@
 	struct dns_process_state *state = tevent_req_data(
 		req, struct dns_process_state);
 	WERROR ret;
+	uint16_t operation;
 
 	ret = dns_server_process_query_recv(
-		subreq, state,
+		subreq, state, &operation,
 		&state->out_packet.answers, &state->out_packet.ancount,
 		&state->out_packet.nsrecs,  &state->out_packet.nscount,
 		&state->out_packet.additional, &state->out_packet.arcount);
 	TALLOC_FREE(subreq);
+	state->dns_err = operation & DNS_RCODE;
 
 	if (!W_ERROR_IS_OK(ret)) {
 		state->dns_err = werr_to_dns_err(ret);