diff --git a/python/common_variables_cff.py b/python/common_variables_cff.py
index a72810d7860..fd651cf68dd 100644
--- a/python/common_variables_cff.py
+++ b/python/common_variables_cff.py
@@ -74,6 +74,7 @@
   #  tkExpHitOut = cms.string("? track.isNull ? 0 : track.trackerExpectedHitsOuter().numberOfLostHits"),
     tkExpHitIn = cms.string("? track.isNull ? 0 : track.hitPattern.numberOfLostHits('MISSING_INNER_HITS')"), #reco::HitPattern::
     tkExpHitOut = cms.string("? track.isNull ? 0 : track.hitPattern.numberOfLostHits('MISSING_OUTER_HITS')"), #reco::HitPattern::
+    tkLostHits = cms.string("? innerTrack.isNull ? 0 : innerTrack.numberOfLostHits"),
     #  tkHitFract  = cms.string("? track.isNull ? 0 : track.hitPattern.numberOfValidHits/(track.hitPattern.numberOfValidHits+track.hitPattern.numberOfLostHits+track.trackerExpectedHitsInner().numberOfLostHits+track.trackerExpectedHitsOuter().numberOfLostHits)"),
     tkHitFract  = cms.string("? track.isNull ? 0 : track.hitPattern.numberOfValidHits/(track.hitPattern.numberOfValidHits+track.hitPattern.numberOfLostHits('TRACK_HITS')+track.hitPattern.numberOfLostHits('MISSING_INNER_HITS')+ track.hitPattern.numberOfLostHits('MISSING_OUTER_HITS') )"),
     tkChi2 = cms.string("? track.isNull ? -1 : track.normalizedChi2"),
@@ -169,6 +170,7 @@
                         " innerTrack.hitPattern.numberOfValidPixelHits > 0 && " + 
                         " abs(track.ptError / pt) < 0.10 )"),
     MuIDForOutsideInTk = cms.string("isStandAloneMuon && outerTrack.pt > 10 && outerTrack.hitPattern.muonStationsWithValidHits() >= 2"),
+    TMArbitratedTrackQual = cms.string("isTrackerMuon && numberOfMatchedStations > 0 && (track.numberOfValidHits  >= 10 || (track.numberOfValidHits  >= 7 &&  innerTrack.numberOfLostHits == 0))"), 
 )
 
 HighPtTriggerFlags = cms.PSet(