diff --git a/Reconstruction/TrackCaloClusterRec/TrackCaloClusterRecTools/TrackCaloClusterRecTools/TrackCaloClusterTool.h b/Reconstruction/TrackCaloClusterRec/TrackCaloClusterRecTools/TrackCaloClusterRecTools/TrackCaloClusterTool.h
index cc0ec9beddf705faa59cc13ea568120503876893..54764ec69cbb14231f437ec49081a638ced1b548 100644
--- a/Reconstruction/TrackCaloClusterRec/TrackCaloClusterRecTools/TrackCaloClusterRecTools/TrackCaloClusterTool.h
+++ b/Reconstruction/TrackCaloClusterRec/TrackCaloClusterRecTools/TrackCaloClusterRecTools/TrackCaloClusterTool.h
@@ -37,7 +37,7 @@ public:
 
   virtual StatusCode initialize() override ;
 
-  virtual StatusCode fillTCC(xAOD::FlowElementContainer* container, const TrackCaloClusterInfo & tccInfo ) const =0;
+  virtual StatusCode fillTCC(xAOD::FlowElementContainer* container, const TrackCaloClusterInfo & tccInfo ) const override =0;
     
 protected: