diff --git a/bec_widgets/widgets/control/device_control/positioner_box/_base/positioner_box_base.py b/bec_widgets/widgets/control/device_control/positioner_box/_base/positioner_box_base.py
index e6445efd8..1e3b52d5f 100644
--- a/bec_widgets/widgets/control/device_control/positioner_box/_base/positioner_box_base.py
+++ b/bec_widgets/widgets/control/device_control/positioner_box/_base/positioner_box_base.py
@@ -123,7 +123,7 @@ def _stop_device(self, device: str):
             queue="emergency",
             metadata={"RID": request_id, "response": False},
         )
-        self.client.connector.send(MessageEndpoints.scan_queue_request(), msg)
+        self.client.connector.send(MessageEndpoints.scan_queue_request(self.client.username), msg)
 
     # pylint: disable=unused-argument
     def _on_device_readback(
diff --git a/tests/unit_tests/test_positioner_box.py b/tests/unit_tests/test_positioner_box.py
index 531a494e4..34607bde1 100644
--- a/tests/unit_tests/test_positioner_box.py
+++ b/tests/unit_tests/test_positioner_box.py
@@ -98,7 +98,9 @@ def test_positioner_box_on_stop(positioner_box):
             queue="emergency",
             metadata={"RID": "fake_uuid", "response": False},
         )
-        mock_send.assert_called_once_with(MessageEndpoints.scan_queue_request(), msg)
+        mock_send.assert_called_once_with(
+            MessageEndpoints.scan_queue_request(positioner_box.client.username), msg
+        )
 
 
 def test_positioner_box_setpoint_change(positioner_box):