diff --git a/DDG4/python/DDG4.py b/DDG4/python/DDG4.py
index 15c9e50f818ed844a723b0d046cb3b3202e593cf..c34b82d7a19ed56ba22ced97a405dff000a25bb8 100644
--- a/DDG4/python/DDG4.py
+++ b/DDG4/python/DDG4.py
@@ -14,6 +14,7 @@ from DD4hep import *
 
 def loadDDG4():
   from ROOT import gSystem
+  result = gSystem.Load("libglapi")
   result = gSystem.Load("libDDG4Plugins")
   if 0 != result:
     raise Exception('DDG4.py: Failed to load the Geant4 library libDDG4: '+gSystem.GetErrorStr())