diff --git a/DDG4/include/DDG4/Geant4Particle.h b/DDG4/include/DDG4/Geant4Particle.h
index d6eae87ca13728da5031a331ed9ce73fb0bdfa07..eb9d30d8a45b9dc4a52fb4b12958c243f8be07b6 100644
--- a/DDG4/include/DDG4/Geant4Particle.h
+++ b/DDG4/include/DDG4/Geant4Particle.h
@@ -105,7 +105,9 @@ namespace DD4hep {
       typedef std::set<int> Particles;
       /// Reference counter
       int ref = 0;           //! not persistent
-      int id  = 0, originalG4ID = 0, g4Parent = 0, reason = 0, mask = 0;
+      int id  = 0;
+      int originalG4ID = 0;  //! not persistent
+      int g4Parent = 0, reason = 0, mask = 0;
       int steps  = 0, secondaries = 0, pdgID = 0;
       int status = 0, colorFlow[2] {0,0};
       char charge = 0, _spare[3] {0,0,0};