diff --git a/playground/matplus/marco-thom/marco-thom.bpmn b/playground/matplus/marco-thom/marco-thom.bpmn
index c436c31e..5e2ab20a 100644
--- a/playground/matplus/marco-thom/marco-thom.bpmn
+++ b/playground/matplus/marco-thom/marco-thom.bpmn
@@ -73,6 +73,8 @@ You can also change the text you are reading here by updating the *Instructions*
       <bpmn:outgoing>Flow_0cg5j3j</bpmn:outgoing>
     </bpmn:task>
     <bpmn:sequenceFlow id="Flow_0cg5j3j" sourceRef="Activity_146chlu" targetRef="Activity_0eei6u6" />
+    <bpmn:dataObject id="DataObject_0ecllxl" name="Data Object 0 Ecllxl" />
+    <bpmn:dataObjectReference id="DataObjectReference_1tlymxi" dataObjectRef="DataObject_0ecllxl" />
   </bpmn:process>
   <bpmndi:BPMNDiagram id="BPMNDiagram_1">
     <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_marco_thom_4l3bjoe">