diff --git a/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py b/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
index 1fb9338..013bd90 100644
--- a/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
+++ b/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
@@ -430,8 +430,12 @@ class MCSCardCSAXS(PSIDeviceBase, MCSCard):
             else:
                 value = [value]  # Received single value, convert to list
             data = {
-                attr_name: {"value": value, "timestamp": kwargs.get("timestamp") or time.time()}
+                mca_channel.name: {
+                    "value": value,
+                    "timestamp": kwargs.get("timestamp") or time.time(),
+                }
             }
+
             mca_channel.put(data)
             # self._received_updates.update(data)
             # if len(self._received_updates) == self.num_connected_channels: