diff --git a/Configuration/Skimming/python/PbPb_UPC_Monopole_cff.py b/Configuration/Skimming/python/PbPb_UPC_Monopole_cff.py
index 54a22318b1296..2f6dcf665e2b4 100644
--- a/Configuration/Skimming/python/PbPb_UPC_Monopole_cff.py
+++ b/Configuration/Skimming/python/PbPb_UPC_Monopole_cff.py
@@ -7,9 +7,12 @@
 hltUPCMonopole.throw = False
 hltUPCMonopole.andOr = True
 
+from HLTrigger.special.hltPixelActivityFilter_cfi import hltPixelActivityFilter as _hltPixelActivityFilter
+hltPixelActivityFilterMinClusters40 = _hltPixelActivityFilter.clone(inputTag = "siPixelClusters", minClusters = 40)
+
 from Configuration.Skimming.PDWG_EXOMONOPOLE_cff import EXOMonopoleSkimContent
 upcMonopoleSkimContent = EXOMonopoleSkimContent.clone()
 upcMonopoleSkimContent.outputCommands.append('keep FEDRawDataCollection_rawDataRepacker_*_*')
 
 # UPC monopole skim sequence
-upcMonopoleSkimSequence = cms.Sequence(hltUPCMonopole)
+upcMonopoleSkimSequence = cms.Sequence(hltUPCMonopole * hltPixelActivityFilterMinClusters40)