diff --git a/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderTool.h b/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderTool.h
index 60fe7f011285640a5dbe714e5ac3f88769ef378d..b566b842dd9c58e77261e2df6ee6106cc03eab4b 100644
--- a/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderTool.h
+++ b/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderTool.h
@@ -32,17 +32,17 @@ namespace Muon
       virtual ~TGC_RawDataProviderTool()=default;
       
       /** Standard AlgTool method */
-      virtual StatusCode initialize();
+      virtual StatusCode initialize() override;
       
       /** Old decoding method which uses IROBDataProviderSvc in TgcRdoToPrepDataTool */
-      virtual StatusCode convert(const ROBFragmentList& vecRobs);
+      virtual StatusCode convert(const ROBFragmentList& vecRobs) override;
       /** Old decoding method which uses IROBDataProviderSvc in TgcRdoToPrepDataTool with IdentifierHash vector */
       virtual StatusCode convert(const ROBFragmentList& vecRobs,
-				 const std::vector<IdentifierHash>& rdoIdhVect);
+				 const std::vector<IdentifierHash>& rdoIdhVect) override;
       /** New decoding methods which do not use IROBDataProviderSvc in TgcRdoToPrepDataTool */
-      virtual StatusCode convert();
+      virtual StatusCode convert() override;
       /** New decoding methods which do not use IROBDataProviderSvc in TgcRdoToPrepDataTool with ID Hash vector */
-      virtual StatusCode convert(const std::vector<IdentifierHash>& rdoIdhVect);
+      virtual StatusCode convert(const std::vector<IdentifierHash>& rdoIdhVect) override;
       
       /** EventContext ones **/
       virtual StatusCode convert(const ROBFragmentList&, const EventContext&) const override;
@@ -53,7 +53,7 @@ namespace Muon
     private:
 
       /** convert from vector of ROB IDs is not available */
-      virtual StatusCode convert(const std::vector<uint32_t>&) {return StatusCode::FAILURE;}
+      virtual StatusCode convert(const std::vector<uint32_t>&) override {return StatusCode::FAILURE;}
       /** EventContext ones **/
       virtual StatusCode convert(const std::vector<uint32_t>&, const EventContext&) const override {return StatusCode::FAILURE;}
 
diff --git a/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderToolMT.h b/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderToolMT.h
index 1fbada24c0072627d4ee031f1b5d6c0f39012b06..8eebcdb3d124b967cb16f7dc4a56a9e933398137 100644
--- a/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderToolMT.h
+++ b/MuonSpectrometer/MuonCnv/MuonTGC_CnvTools/src/TGC_RawDataProviderToolMT.h
@@ -31,17 +31,17 @@ namespace Muon
       virtual ~TGC_RawDataProviderToolMT()=default;
       
       /** Standard AlgTool method */
-      virtual StatusCode initialize();
+      virtual StatusCode initialize() override;
       
       /** Old decoding method which uses IROBDataProviderSvc in TgcRdoToPrepDataTool */
-      virtual StatusCode convert(const ROBFragmentList& vecRobs);
+      virtual StatusCode convert(const ROBFragmentList& vecRobs) override;
       /** Old decoding method which uses IROBDataProviderSvc in TgcRdoToPrepDataTool with IdentifierHash vector */
       virtual StatusCode convert(const ROBFragmentList& vecRobs,
-				 const std::vector<IdentifierHash>& rdoIdhVect);
+				 const std::vector<IdentifierHash>& rdoIdhVect) override;
       /** New decoding methods which do not use IROBDataProviderSvc in TgcRdoToPrepDataTool */
-      virtual StatusCode convert();
+      virtual StatusCode convert() override;
       /** New decoding methods which do not use IROBDataProviderSvc in TgcRdoToPrepDataTool with ID Hash vector */
-      virtual StatusCode convert(const std::vector<IdentifierHash>& rdoIdhVect);
+      virtual StatusCode convert(const std::vector<IdentifierHash>& rdoIdhVect) override;
 
       /** EventContext ones **/
       virtual StatusCode convert(const ROBFragmentList&, const EventContext&) const override;
@@ -54,7 +54,7 @@ namespace Muon
       SG::UpdateHandleKey<TgcRdo_Cache> m_rdoContainerCacheKey ;
 
       /** convert from vector of ROB IDs is not available */
-      virtual StatusCode convert(const std::vector<uint32_t>&) {return StatusCode::FAILURE;}
+      virtual StatusCode convert(const std::vector<uint32_t>&) override {return StatusCode::FAILURE;}
       /** EventContext ones **/
       virtual StatusCode convert(const std::vector<uint32_t>&, const EventContext&) const override {return StatusCode::FAILURE;}