diff --git a/src/PartBunch/PartBunch.hpp b/src/PartBunch/PartBunch.hpp
index b4aade3e1077763b2ca485219417ce9cca01e3e5..0efa58f6521b4f6857deb89dff4fa4ff7ebb8a6e 100644
--- a/src/PartBunch/PartBunch.hpp
+++ b/src/PartBunch/PartBunch.hpp
@@ -109,12 +109,6 @@ private:
 
     double rmsDensity_m;
 
-    /// step in a TRACK command
-    long long localTrackStep_m;
-
-    /// if multiple TRACK commands
-    long long globalTrackStep_m;
-
 
     std::shared_ptr<Distribution> OPALdist_m;
 
diff --git a/src/PartBunch/ParticleContainer.hpp b/src/PartBunch/ParticleContainer.hpp
index b0b5169ca2ede0e2a49fe441b99071e4d39e66fe..5f207f5e16efeee4a0a15aad84899c6ec2d78f5a 100644
--- a/src/PartBunch/ParticleContainer.hpp
+++ b/src/PartBunch/ParticleContainer.hpp
@@ -172,7 +172,7 @@ public:
         return distMoments_m.getPlasmaParameter();
     }
 
-    void computeDebyeLength(double density){
+    double computeDebyeLength(double density){
         size_t Np = this->getTotalNum();
         distMoments_m.computeDebyeLength(this->R.getView(), this->P.getView(), Np, density);
         return distMoments_m.getDebyeLength();