diff --git a/DDG4/src/Geant4ParticleHandler.cpp b/DDG4/src/Geant4ParticleHandler.cpp
index 329408581e66cc3444268112494b3c7ebf47caac..8ec8c91cc4ec11f70b4c3265ea4ee4c0eadf039a 100644
--- a/DDG4/src/Geant4ParticleHandler.cpp
+++ b/DDG4/src/Geant4ParticleHandler.cpp
@@ -39,7 +39,6 @@
 #include <stdexcept>
 #include <algorithm>
 
-using CLHEP::MeV;
 using namespace std;
 using namespace dd4hep;
 using namespace dd4hep::sim;