diff --git a/Detectors/TPC/monitor/include/TPCMonitor/SimpleEventDisplay.h b/Detectors/TPC/monitor/include/TPCMonitor/SimpleEventDisplay.h
index 880eda5a2c36d..d9c51d0a1ee3b 100644
--- a/Detectors/TPC/monitor/include/TPCMonitor/SimpleEventDisplay.h
+++ b/Detectors/TPC/monitor/include/TPCMonitor/SimpleEventDisplay.h
@@ -65,7 +65,7 @@ class SimpleEventDisplay : public CalibRawBase
 
   void setPedstals(CalPad* pedestals) { mPedestals = pedestals; }
 
-  void setSignalThreshold(UInt_t signalThreshold) { mSignalThreshold = signalThreshold; }
+  void setSignalThreshold(Int_t signalThreshold) { mSignalThreshold = signalThreshold; }
 
   void setShowOccupancy(bool showOccupancy) { mShowOccupancy = showOccupancy; }
 
@@ -83,28 +83,28 @@ class SimpleEventDisplay : public CalibRawBase
   void endEvent() final{};
 
  private:
-  CalPad mPadMax;       //!< Cal Pad with max Entry per channel
-  CalPad mPadOccupancy; //!< Cal Pad with Occupancy per channel
-  TH2D* mHSigIROC;      //!< iroc signals
-  TH2D* mHSigOROC;      //!< oroc signals
-  CalPad* mPedestals;   //!< Pedestal calibratino object
-
-  Int_t mCurrentChannel;   //!< current channel processed
-  Int_t mCurrentROC;       //!< current ROC processed
-  Int_t mLastSector;       //!< Last sector processed
-  Int_t mSelectedSector;   //!< Sector selected for processing
-  Int_t mLastSelSector;    //!< Last sector selected for processing
-  Int_t mCurrentRow;       //!< current row processed
-  Int_t mCurrentPad;       //!< current pad processed
-  Float_t mMaxPadSignal;   //!< maximum bin of current pad
-  Int_t mMaxTimeBin;       //!< time bin with maximum value
-  Bool_t mSectorLoop;      //!< only process one sector
-  Int_t mFirstTimeBin;     //!< first time bin to accept
-  Int_t mLastTimeBin;      //!< last time bin to accept
-  UInt_t mSignalThreshold; //!< minimum adc value
-  Bool_t mShowOccupancy;   //!< true iff occupancy should be calculated, false otherwise
-
-  const Mapper& mTPCmapper; //! mapper
+  CalPad mPadMax;       ///< Cal Pad with max Entry per channel
+  CalPad mPadOccupancy; ///< Cal Pad with Occupancy per channel
+  TH2D* mHSigIROC;      ///< iroc signals
+  TH2D* mHSigOROC;      ///< oroc signals
+  CalPad* mPedestals;   ///< Pedestal calibratino object
+
+  Int_t mCurrentChannel;  ///< current channel processed
+  Int_t mCurrentROC;      ///< current ROC processed
+  Int_t mLastSector;      ///< Last sector processed
+  Int_t mSelectedSector;  ///< Sector selected for processing
+  Int_t mLastSelSector;   ///< Last sector selected for processing
+  Int_t mCurrentRow;      ///< current row processed
+  Int_t mCurrentPad;      ///< current pad processed
+  Float_t mMaxPadSignal;  ///< maximum bin of current pad
+  Int_t mMaxTimeBin;      ///< time bin with maximum value
+  Bool_t mSectorLoop;     ///< only process one sector
+  Int_t mFirstTimeBin;    ///< first time bin to accept
+  Int_t mLastTimeBin;     ///< last time bin to accept
+  Int_t mSignalThreshold; ///< minimum adc value
+  Bool_t mShowOccupancy;  ///< true iff occupancy should be calculated, false otherwise
+
+  const Mapper& mTPCmapper; /// mapper
 
   void resetEvent() final;
   void initHistograms();