diff --git a/eic_data.yaml b/eic_data.yaml
index f2f3f3792650aa50d12a0a3ffbdfbe3f1d7a6bba..e5baf57ae02eaa986fefd57678087121bbf38696 100644
--- a/eic_data.yaml
+++ b/eic_data.yaml
@@ -117,6 +117,9 @@ datatypes :
     Author : "W.Armstrong"
     Members:
       - long long           cellID    // The detector specific (geometrical) cell id.
+      - int                 clusterID // ID of the cluster that owns this hit
+      - int                 layerID   // ID of the layer that has this hit
+      - int                 sectorID  // ID of the sector that has this hit
       - float               energy    // The energy of the hit in [GeV].
       - float               time      // The time of the hit in [ns].
       - eic::VectorXYZ      position  // The global position of the hit in world coordinates.