diff --git a/OneM2M_Types.ttcn b/OneM2M_Types.ttcn
index e6990d59ab3fa39e4d2e217171d32c6a816e58d7..6871c87f2af7921cc99bbfe32ef218ea81ce47d1 100644
--- a/OneM2M_Types.ttcn
+++ b/OneM2M_Types.ttcn
@@ -8919,8 +8919,8 @@ type record CoapBindingDesc {
 type record MqttBindingDesc {
 	ProtocolBindings bindingProtocol (e_mqtt),
 	BindingDesc      bindingDesc,
-	XSD.ID       	 originator,
-	XSD.ID		     receiver
+	XSD.ID       	 originator optional,
+	XSD.ID		     receiver optional
 	// TODO To be completed
 }