diff --git a/tracking/scripts/rec_central_electrons.cxx b/tracking/scripts/rec_central_electrons.cxx
index d58cd1ba60337b3b12fc88477deea3c76d06f721..50f7c34d826ee10c6a91f61afa9577ac7d81b6b6 100644
--- a/tracking/scripts/rec_central_electrons.cxx
+++ b/tracking/scripts/rec_central_electrons.cxx
@@ -35,6 +35,7 @@ std::vector<float> pt (std::vector<dd4pod::Geant4ParticleData> const& in){
 auto momentum = [](std::vector<ROOT::Math::PxPyPzMVector> const& in) {
   std::vector<double> result;
   for (size_t i = 0; i < in.size(); ++i) {
+    return in[i].E();
    result.push_back(in[i].E());
   }
   return result;