diff --git a/Detector/DetComponents/src/RedoSegmentation.h b/Detector/DetComponents/src/RedoSegmentation.h
index 17c6056..d5909e7 100644
--- a/Detector/DetComponents/src/RedoSegmentation.h
+++ b/Detector/DetComponents/src/RedoSegmentation.h
@@ -64,7 +64,7 @@ class RedoSegmentation : public GaudiAlgorithm {
   /// Handle for the EDM hits to be written
   DataHandle<edm4hep::SimCalorimeterHitCollection> m_outHits{
       "hits/caloOutHits", Gaudi::DataHandle::Writer, this};
-  /// Handle for the output hits cell id encoding
+  /// Handle for the output hits cell id encoding. The name MUST be "CellIDEncoding"
   MetaDataHandle<std::string> m_outHitsCellIDEncoding{
       m_outHits,"CellIDEncoding", Gaudi::DataHandle::Writer};
   /// New segmentation