diff --git a/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py b/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py
index 36302f068f724..eaf6117727add 100644
--- a/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py
+++ b/Configuration/Generator/python/DYToll01234Jets_5f_LO_MLM_Madgraph_LHE_13TeV_cff.py
@@ -6,5 +6,6 @@
   numberOfParameters = cms.uint32(4),
   args = cms.vstring('/cvmfs/cms.cern.ch/phys_generator/gridpacks/UL/13TeV/madgraph/V5_2.6.5/dyellell01234j_5f_LO_MLM_v2/DYJets_HT-incl_slc6_amd64_gcc630_CMSSW_9_3_16_tarball.tar.xz','false','slc6_amd64_gcc630','CMSSW_9_3_16'),
   nEvents = cms.untracked.uint32(10),
-  generateConcurrently = cms.untracked.bool(True)
+  generateConcurrently = cms.untracked.bool(True),
+  postGenerationCommand = cms.untracked.vstring('mergeLHE.py', '-i', 'thread*/cmsgrid_final.lhe', '-o', 'cmsgrid_final.lhe'),
 )