diff --git a/Event/PyDumper/python/SgDumpLib.py b/Event/PyDumper/python/SgDumpLib.py
index 2cda0d0fe96ce17b7f261a76c7550491bf5aed1a..efcce5bbb85276d7e62f065e41496a1550a14a6a 100644
--- a/Event/PyDumper/python/SgDumpLib.py
+++ b/Event/PyDumper/python/SgDumpLib.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 
 # @file    PyDumper.SgDumpLib
 # @purpose API for the sg-dump script
@@ -87,6 +87,9 @@ def _gen_jobo(dct):
                      ):
             getattr (rec, item).set_Value_and_Lock(False)
 
+        # Disables more stuff we don't need.
+        rec.doAODMerging.set_Value_and_Lock(True)
+
         # events to process
         acf.EvtMax = %(evts)s
         acf.SkipEvents = %(skip)s