diff --git a/Reconstruction/HeavyIonRec/HIJetRec/HIJetRec/HIJetConstituentModifierTool.h b/Reconstruction/HeavyIonRec/HIJetRec/HIJetRec/HIJetConstituentModifierTool.h
index f9e5f03e740d0e0ae11d25aa046edfe0c91572b5..92feba8ce737addccb41f845b88dc6c8e21b8c73 100644
--- a/Reconstruction/HeavyIonRec/HIJetRec/HIJetRec/HIJetConstituentModifierTool.h
+++ b/Reconstruction/HeavyIonRec/HIJetRec/HIJetRec/HIJetConstituentModifierTool.h
@@ -32,7 +32,7 @@ class HIJetConstituentModifierTool : public JetModifierBase {
 
   virtual StatusCode initialize() override;
   // Inherited method to modify a jet.
-  virtual int modifyJet(xAOD::Jet& jet) const;
+  virtual int modifyJet(xAOD::Jet& jet) const override;
 
  private:
    /// \brief Name of input cluster container