--- source4/dns_server/dns_server.h.orig	2017-11-02 12:38:36.000000000 +0100
+++ source4/dns_server/dns_server.h	2019-10-05 18:09:53.000000000 +0200
@@ -71,6 +71,7 @@
 	const struct dns_name_packet *in);
 WERROR dns_server_process_query_recv(
 	struct tevent_req *req, TALLOC_CTX *mem_ctx,
+	uint16_t *operation,
 	struct dns_res_rec **answers,    uint16_t *ancount,
 	struct dns_res_rec **nsrecs,     uint16_t *nscount,
 	struct dns_res_rec **additional, uint16_t *arcount);