diff --git a/LibOneM2M/OneM2M_Types.ttcn b/LibOneM2M/OneM2M_Types.ttcn
index ab0658524fcdc04eaf3ba324fd122e41ddfa6a84..8df17134dbcb16cc3d8c0f3760b295cd0c4bd902 100644
--- a/LibOneM2M/OneM2M_Types.ttcn
+++ b/LibOneM2M/OneM2M_Types.ttcn
@@ -8908,8 +8908,8 @@ 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
 }