diff --git a/DDSim/DD4hepSimulation.py b/DDSim/DD4hepSimulation.py
index 86a1f01a14f2a80fc2c0aa6a48916ce13e9e52e6..164d323b4e1bc5610eca7c6ce59558ae1fce1b5c 100644
--- a/DDSim/DD4hepSimulation.py
+++ b/DDSim/DD4hepSimulation.py
@@ -335,7 +335,7 @@ class DD4hepSimulation(object):
         gen = DDG4.GeneratorAction(kernel,"LCIOInputAction/STDHEP%d" % index)
         gen.Input="LCIOStdHepReader|"+inputFile
       elif inputFile.endswith(".HEPEvt"):
-        gen = DDG4.GeneratorAction(kernel,"LCIOInputAction/HEPEvt%d" % index)
+        gen = DDG4.GeneratorAction(kernel,"Geant4InputAction/HEPEvt%d" % index)
         gen.Input="Geant4EventReaderHepEvtShort|"+inputFile
       elif inputFile.endswith(".hepevt"):
         gen = DDG4.GeneratorAction(kernel,"Geant4InputAction/hepevt%d" % index)