diff --git a/src/external/TFitPofB-lib/include/TLondon1D.h b/src/external/TFitPofB-lib/include/TLondon1D.h
index 014281d3..bbe93c93 100644
--- a/src/external/TFitPofB-lib/include/TLondon1D.h
+++ b/src/external/TFitPofB-lib/include/TLondon1D.h
@@ -30,6 +30,7 @@ private:
   TPofTCalc *fPofT;
   mutable bool fCalcNeeded;
   mutable bool fFirstCall;
+  mutable bool fDeadLayerChanged;
   mutable vector<double> fParForPofT;
   mutable vector<double> fParForBofZ;
   mutable vector<double> fParForPofB;