diff --git a/mgw/MGCP_Test.ttcn b/mgw/MGCP_Test.ttcn
index 26a070123..68684050a 100644
--- a/mgw/MGCP_Test.ttcn
+++ b/mgw/MGCP_Test.ttcn
@@ -326,7 +326,7 @@ module MGCP_Test {
 		/* See also OS#2658: Even when we omit the LCO information, we
 		   expect the MGW to pick a sane payload type for us. This
 		   payload type should be visible in the SDP of the response. */
-		if (resp.sdp.media_list[0].attributes[0].rtpmap.attr_value != "0 PCMU/8000/1") {
+		if (resp.sdp.media_list[0].media_field.fmts[0] != "0") {
 			setverdict(fail, "SDP contains unexpected codec");
 		}