diff --git a/MuonSpectrometer/MuonCalib/NSWCalib/NSWCalibTools/src/NSWCalibTool.h b/MuonSpectrometer/MuonCalib/NSWCalib/NSWCalibTools/src/NSWCalibTool.h
index 8dfae42011729524a23dbb88fc7f4e285638c9c5..a4a7dba0c044c0219dd4bf1e4a15f7ee14e2e062 100644
--- a/MuonSpectrometer/MuonCalib/NSWCalib/NSWCalibTools/src/NSWCalibTool.h
+++ b/MuonSpectrometer/MuonCalib/NSWCalib/NSWCalibTools/src/NSWCalibTool.h
@@ -32,9 +32,9 @@ namespace Muon {
 
     virtual ~NSWCalibTool() = default;
     
-    StatusCode calibrateClus(const Muon::MMPrepData* prepData, const Amg::Vector3D& globalPos, std::vector<NSWCalib::CalibratedStrip>& calibClus) const;
-    StatusCode calibrateStrip(const double time,  const double charge, const double lorentzAngle, NSWCalib::CalibratedStrip& calibStrip) const;
-    StatusCode calibrateStrip(const Muon::MM_RawData* mmRawData, NSWCalib::CalibratedStrip& calibStrip) const;
+    virtual StatusCode calibrateClus(const Muon::MMPrepData* prepData, const Amg::Vector3D& globalPos, std::vector<NSWCalib::CalibratedStrip>& calibClus) const override;
+    virtual StatusCode calibrateStrip(const double time,  const double charge, const double lorentzAngle, NSWCalib::CalibratedStrip& calibStrip) const override;
+    virtual StatusCode calibrateStrip(const Muon::MM_RawData* mmRawData, NSWCalib::CalibratedStrip& calibStrip) const override;
 
     virtual StatusCode initialize() override;
     virtual StatusCode finalize() override;