diff --git a/SimTracker/TrackAssociation/python/globalMuonsMCMatch_cfi.py b/SimTracker/TrackAssociation/python/globalMuonsMCMatch_cfi.py
index 4a947991ee479..e9a17e8c7b76f 100644
--- a/SimTracker/TrackAssociation/python/globalMuonsMCMatch_cfi.py
+++ b/SimTracker/TrackAssociation/python/globalMuonsMCMatch_cfi.py
@@ -4,7 +4,8 @@
     trackingParticles = cms.InputTag("mix","MergedTrackTruth"),
     tracks = cms.InputTag("globalMuons"),
     genParticles = cms.InputTag("genParticles"),
-    associator = cms.InputTag('trackAssociatorByHits')
+    associator = cms.string('trackAssociatorByHits'),
+    throwOnMissingTPCollection = cms.bool(True)
 )
 
 
diff --git a/SimTracker/TrackAssociation/python/standAloneMuonsMCMatch_cfi.py b/SimTracker/TrackAssociation/python/standAloneMuonsMCMatch_cfi.py
index f78a0a489015e..074fa64107894 100644
--- a/SimTracker/TrackAssociation/python/standAloneMuonsMCMatch_cfi.py
+++ b/SimTracker/TrackAssociation/python/standAloneMuonsMCMatch_cfi.py
@@ -4,7 +4,8 @@
     trackingParticles = cms.InputTag("mix","MergedTrackTruth"),
     tracks = cms.InputTag("standAloneMuons"),
     genParticles = cms.InputTag("genParticles"),
-    associator = cms.InputTag('trackAssociatorByHits')
+    associator = cms.string('trackAssociatorByHits'),
+    throwOnMissingTPCollection = cms.bool(True)
 )
 
 
diff --git a/SimTracker/TrackAssociation/python/trackMCMatch_cfi.py b/SimTracker/TrackAssociation/python/trackMCMatch_cfi.py
index 18993db9610dd..2b2db62f4bc50 100644
--- a/SimTracker/TrackAssociation/python/trackMCMatch_cfi.py
+++ b/SimTracker/TrackAssociation/python/trackMCMatch_cfi.py
@@ -4,7 +4,7 @@
     trackingParticles = cms.InputTag("mix","MergedTrackTruth"),
     tracks = cms.InputTag("generalTracks"),
     genParticles = cms.InputTag("genParticles"),
-    associator = cms.string('TrackAssociatorByHits'),
+    associator = cms.string('trackAssociatorByHits'),
     throwOnMissingTPCollection = cms.bool(True)
 )