diff --git a/shipLHC/makeGeoFile.py b/shipLHC/makeGeoFile.py
index 4728a236f9..22c8aae09e 100644
--- a/shipLHC/makeGeoFile.py
+++ b/shipLHC/makeGeoFile.py
@@ -7,7 +7,6 @@
 mcEngine     = "TGeant4"
 
 parser = ArgumentParser()
-group = parser.add_mutually_exclusive_group()
 
 parser.add_argument("-c",   dest="config",   help="configuration file", required=True)
 parser.add_argument("-g",   dest="geofile",   help="geo file output name", required=True)