diff --git a/Configuration/DataProcessing/python/Merge.py b/Configuration/DataProcessing/python/Merge.py
index 7c2659a61d727..fc59dbab9048f 100644
--- a/Configuration/DataProcessing/python/Merge.py
+++ b/Configuration/DataProcessing/python/Merge.py
@@ -66,6 +66,7 @@ def mergeProcess(*inputFiles, **options):
     elif mergeNANO:
         import Configuration.EventContent.EventContent_cff
         outMod = OutputModule("NanoAODOutputModule",Configuration.EventContent.EventContent_cff.NANOAODEventContent.clone())
+        process.add_(Service("InitRootHandlers", EnableIMT = CfgTypes.untracked.bool(False)))
     else:
         outMod = OutputModule("PoolOutputModule")