diff -up bind-9.4.1-P1/lib/dns/message.c.update bind-9.4.1-P1/lib/dns/message.c
--- bind-9.4.1-P1/lib/dns/message.c.update	2007-08-14 10:53:25.000000000 +0200
+++ bind-9.4.1-P1/lib/dns/message.c	2007-08-14 10:54:52.000000000 +0200
@@ -1308,6 +1308,11 @@ getsection(isc_buffer_t *source, dns_mes
 			rdata->type = rdtype;
 			rdata->flags = DNS_RDATA_UPDATE;
 			result = ISC_R_SUCCESS;
+		} else if (rdclass == dns_rdataclass_none &&
+			   msg->opcode == dns_opcode_update &&
+			   sectionid == DNS_SECTION_UPDATE) {
+			result = getrdata(source, msg, dctx, msg->rdclass,
+					  rdtype, rdatalen, rdata);
 		} else
 			result = getrdata(source, msg, dctx, rdclass,
 					  rdtype, rdatalen, rdata);