diff --git a/Simulation/G4Extensions/Quirks/src/QuirkTransportation.cxx b/Simulation/G4Extensions/Quirks/src/QuirkTransportation.cxx
index 822926807c3d7bcaff028505463ce8389c959c82..85afe52ba60c226d09f22127b5cc7012936857d3 100644
--- a/Simulation/G4Extensions/Quirks/src/QuirkTransportation.cxx
+++ b/Simulation/G4Extensions/Quirks/src/QuirkTransportation.cxx
@@ -83,7 +83,6 @@ QuirkTransportation::QuirkTransportation( G4int verboseLevel )
     m_threshold_Warning_Energy( 100 * CLHEP::MeV ),  
     m_threshold_Important_Energy( 250 * CLHEP::MeV ), 
     m_thresholdTrials( 10 ), 
-    m_unimportant_Energy( 1 * CLHEP::MeV ),  // Not used
     m_noLooperTrials(0),
     m_sumEnergyKilled( 0.0 ), m_maxEnergyKilled( 0.0 ), 
     m_shortStepOptimisation(false),    // Old default: true (=fast short steps)
diff --git a/Simulation/G4Extensions/Quirks/src/QuirkTransportation.h b/Simulation/G4Extensions/Quirks/src/QuirkTransportation.h
index 83bac5bb229b967c51835bbe80708e6771f211e9..159fb5353441ed5b39bcdf3c73b4496039ea109d 100644
--- a/Simulation/G4Extensions/Quirks/src/QuirkTransportation.h
+++ b/Simulation/G4Extensions/Quirks/src/QuirkTransportation.h
@@ -158,7 +158,6 @@ class QuirkTransportation : public G4VProcess
      G4double             m_transportEndKineticEnergy;
      G4ThreeVector        m_transportEndSpin;
      G4bool               m_momentumChanged;
-     G4bool               m_energyChanged;
      G4double             m_candidateEndGlobalTime;
        // The particle's state after this Step, Store for DoIt
 
@@ -188,10 +187,6 @@ class QuirkTransportation : public G4VProcess
      G4double m_threshold_Warning_Energy;     //  Warn above this energy
      G4double m_threshold_Important_Energy;   //  Hesitate above this
      G4int    m_thresholdTrials;              //    for this no of trials
-       // Above 'important' energy a 'looping' particle in field will 
-       //   *NOT* be abandoned, except after fThresholdTrials attempts.
-     G4double m_unimportant_Energy;
-       //  Below this energy, no verbosity for looping particles is issued
 
   // Counter for steps in which particle reports 'looping',
   //   if it is above 'Important' Energy