diff --git a/DDSim/DD4hepSimulation.py b/DDSim/DD4hepSimulation.py
index fa230344c8b67c7aad24372077e554d451cbd0cc..c46f8d601b785f8fe54791d132cd283da111b164 100644
--- a/DDSim/DD4hepSimulation.py
+++ b/DDSim/DD4hepSimulation.py
@@ -692,6 +692,7 @@ SIM = DD4hepSimulation()
       print "Enabling the PrimaryHandler"
     else:
       print "Disabling the PrimaryHandler"
+    return enablePrimaryHandler
 
 ################################################################################
 ### MODULE FUNCTIONS GO HERE