diff --git a/mgw/MGCP_Types.ttcn b/mgw/MGCP_Types.ttcn
index efe7620..9b55659 100644
--- a/mgw/MGCP_Types.ttcn
+++ b/mgw/MGCP_Types.ttcn
@@ -65,7 +65,7 @@
 	type record MgcpCommand {
 		MgcpCommandLine		line,
 		MgcpParameterList 	params optional,
-		Sdp			sdp optional
+		SDP_Message		sdp optional
 	} with {
 		variant "BEGIN('')"
 		variant (sdp) "BEGIN('\r\n','([\r\n])|(\r\n)')"
@@ -89,7 +89,7 @@
 	type record MgcpResponse {
 		MgcpResponseLine	line,
 		MgcpParameterList	params optional,
-		Sdp			sdp optional
+		SDP_Message		sdp optional
 	} with {
 		variant "BEGIN('')"
 		variant (sdp) "BEGIN('\r\n','([\r\n])|(\r\n)')"