diff --git a/DataFormats/L1TrackTrigger/BuildFile.xml b/DataFormats/L1TrackTrigger/BuildFile.xml
index 81cd982c6b40d..8498c87b2b9dc 100644
--- a/DataFormats/L1TrackTrigger/BuildFile.xml
+++ b/DataFormats/L1TrackTrigger/BuildFile.xml
@@ -7,7 +7,6 @@
 <use name="DataFormats/TrackerCommon"/>
 <use name="FWCore/MessageLogger"/>
 <use name="FWCore/Utilities"/>
-<use name="SimDataFormats/TrackingAnalysis"/>
 <export>
   <lib name="1"/>
 </export>
diff --git a/DataFormats/L1TrackTrigger/src/TTTrackTruthPair.cc b/DataFormats/L1TrackTrigger/src/TTTrackTruthPair.cc
deleted file mode 100644
index 8b75d2354fbc2..0000000000000
--- a/DataFormats/L1TrackTrigger/src/TTTrackTruthPair.cc
+++ /dev/null
@@ -1 +0,0 @@
-#include "DataFormats/L1TrackTrigger/interface/TTTrackTruthPair.h"
diff --git a/DataFormats/L1TrackTrigger/src/classes.h b/DataFormats/L1TrackTrigger/src/classes.h
index 5693d6f89f49f..f798e6288252f 100644
--- a/DataFormats/L1TrackTrigger/src/classes.h
+++ b/DataFormats/L1TrackTrigger/src/classes.h
@@ -14,7 +14,6 @@
 #include "DataFormats/Common/interface/DetSetVectorNew.h"
 #include "DataFormats/L1TrackTrigger/interface/TTTypes.h"
 #include "DataFormats/L1TrackTrigger/interface/TTDTC.h"
-#include "DataFormats/L1TrackTrigger/interface/TTTrackTruthPair.h"
 #include "DataFormats/Common/interface/RefVector.h"
 #include "DataFormats/Common/interface/RefProd.h"
 
diff --git a/DataFormats/L1TrackTrigger/src/classes_def.xml b/DataFormats/L1TrackTrigger/src/classes_def.xml
index b6dc09f469cee..b7185b6e76860 100644
--- a/DataFormats/L1TrackTrigger/src/classes_def.xml
+++ b/DataFormats/L1TrackTrigger/src/classes_def.xml
@@ -24,10 +24,6 @@
   <class name="std::vector<TTTrack_TrackWord>"/>
   <class name="edm::Wrapper<std::vector<TTTrack_TrackWord> >"/>
   <class name="edm::Ptr<TTTrack<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > >" /> 
-  <class name="TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > >" /> 
-  <class name="std::vector<TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > >" /> 
-  <class name="edm::Ref<std::vector<TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > > >" />
-  <class name="edm::Wrapper<std::vector<TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > > >" />
   <class name="TTDTC"/>
   <class name="edm::Wrapper<TTDTC>"/>
   <class name="TTDTC::Streams"/>
diff --git a/RecoEgamma/EgammaHLTProducers/plugins/BuildFile.xml b/RecoEgamma/EgammaHLTProducers/plugins/BuildFile.xml
index 7cc4346fe1660..316e3225f8d14 100644
--- a/RecoEgamma/EgammaHLTProducers/plugins/BuildFile.xml
+++ b/RecoEgamma/EgammaHLTProducers/plugins/BuildFile.xml
@@ -14,6 +14,7 @@
 <use name="Geometry/TrackerGeometryBuilder"/>
 <use name="DataFormats/L1Trigger"/>
 <use name="DataFormats/L1TrackTrigger"/>
+<use name="SimDataFormats/Associations"/>
 <use name="SimDataFormats/TrackingAnalysis"/>
 <use name="SimTracker/TrackTriggerAssociation"/>
 <use name="TrackingTools/GsfTools"/>
diff --git a/RecoEgamma/EgammaHLTProducers/plugins/EgammaHLTPhase2ExtraProducer.cc b/RecoEgamma/EgammaHLTProducers/plugins/EgammaHLTPhase2ExtraProducer.cc
index 20fe50d39ce60..3a6bd628b79a2 100644
--- a/RecoEgamma/EgammaHLTProducers/plugins/EgammaHLTPhase2ExtraProducer.cc
+++ b/RecoEgamma/EgammaHLTProducers/plugins/EgammaHLTPhase2ExtraProducer.cc
@@ -15,13 +15,13 @@
 #include "DataFormats/EgammaReco/interface/SuperCluster.h"
 #include "DataFormats/EgammaReco/interface/SuperClusterFwd.h"
 #include "DataFormats/L1TrackTrigger/interface/L1Track.h"
-#include "DataFormats/L1TrackTrigger/interface/L1TrackTruthPair.h"
 #include "DataFormats/Math/interface/deltaR.h"
 #include "DataFormats/Common/interface/RefToPtr.h"
 #include "DataFormats/HGCRecHit/interface/HGCRecHit.h"
 #include "DataFormats/HGCRecHit/interface/HGCRecHitCollections.h"
 #include "DataFormats/Common/interface/ValueMap.h"
 
+#include "SimDataFormats/Associations/interface/L1TrackTruthPair.h"
 #include "SimDataFormats/TrackingAnalysis/interface/TrackingParticle.h"
 #include "SimDataFormats/TrackingAnalysis/interface/TrackingParticleFwd.h"
 #include "SimTracker/TrackTriggerAssociation/interface/TTTrackAssociationMap.h"
diff --git a/SimDataFormats/Associations/BuildFile.xml b/SimDataFormats/Associations/BuildFile.xml
index e37183b230928..f060052c1bfd0 100644
--- a/SimDataFormats/Associations/BuildFile.xml
+++ b/SimDataFormats/Associations/BuildFile.xml
@@ -1,6 +1,7 @@
 <use name="DataFormats/CaloRecHit"/>
 <use name="DataFormats/Common"/>
 <use name="DataFormats/HepMCCandidate"/>
+<use name="DataFormats/L1TrackTrigger"/>
 <use name="DataFormats/Math"/>
 <use name="DataFormats/MuonReco"/>
 <use name="DataFormats/RecoCandidate"/>
diff --git a/DataFormats/L1TrackTrigger/interface/L1TrackTruthPair.h b/SimDataFormats/Associations/interface/L1TrackTruthPair.h
similarity index 55%
rename from DataFormats/L1TrackTrigger/interface/L1TrackTruthPair.h
rename to SimDataFormats/Associations/interface/L1TrackTruthPair.h
index 1e936536c1ecf..4f10fb23e347c 100644
--- a/DataFormats/L1TrackTrigger/interface/L1TrackTruthPair.h
+++ b/SimDataFormats/Associations/interface/L1TrackTruthPair.h
@@ -1,7 +1,7 @@
-#ifndef DataFormats_L1TrackTrigger_L1TrackTruthPair_h
-#define DataFormats_L1TrackTrigger_L1TrackTruthPair_h
+#ifndef SimDataFormats_Associations_L1TrackTruthPair_h
+#define SimDataFormats_Associations_L1TrackTruthPair_h
 
-#include "DataFormats/L1TrackTrigger/interface/TTTrackTruthPair.h"
+#include "SimDataFormats/Associations/interface/TTTrackTruthPair.h"
 #include "DataFormats/L1TrackTrigger/interface/TTTypes.h"
 #include <vector>
 
diff --git a/DataFormats/L1TrackTrigger/interface/TTTrackTruthPair.h b/SimDataFormats/Associations/interface/TTTrackTruthPair.h
similarity index 93%
rename from DataFormats/L1TrackTrigger/interface/TTTrackTruthPair.h
rename to SimDataFormats/Associations/interface/TTTrackTruthPair.h
index f0f70daf8d7a2..21313a427e13e 100644
--- a/DataFormats/L1TrackTrigger/interface/TTTrackTruthPair.h
+++ b/SimDataFormats/Associations/interface/TTTrackTruthPair.h
@@ -1,5 +1,5 @@
-#ifndef DataFormats_L1TrackTrigger_TTrackTruthPair_h
-#define DataFormats_L1TrackTrigger_TTrackTruthPair_h
+#ifndef SimDataFormats_Associations_TTrackTruthPair_h
+#define SimDataFormats_Associations_TTrackTruthPair_h
 
 #include "DataFormats/L1TrackTrigger/interface/TTTrack.h"
 #include "DataFormats/L1TrackTrigger/interface/TTTypes.h"
diff --git a/SimDataFormats/Associations/src/TTTrackTruthPair.cc b/SimDataFormats/Associations/src/TTTrackTruthPair.cc
new file mode 100644
index 0000000000000..16726063a6d2f
--- /dev/null
+++ b/SimDataFormats/Associations/src/TTTrackTruthPair.cc
@@ -0,0 +1 @@
+#include "SimDataFormats/Associations/interface/TTTrackTruthPair.h"
diff --git a/SimDataFormats/Associations/src/classes.h b/SimDataFormats/Associations/src/classes.h
index 6e12db392a0a9..7f09758b1d166 100644
--- a/SimDataFormats/Associations/src/classes.h
+++ b/SimDataFormats/Associations/src/classes.h
@@ -8,6 +8,7 @@
 #include "SimDataFormats/Associations/interface/VertexToTrackingVertexAssociator.h"
 #include "SimDataFormats/Associations/interface/LayerClusterToCaloParticleAssociator.h"
 #include "SimDataFormats/Associations/interface/LayerClusterToSimClusterAssociator.h"
+#include "SimDataFormats/Associations/interface/TTTrackTruthPair.h"
 
 namespace SimDataFormats_Associations {
   struct SimDataFormats_Associations {
diff --git a/SimDataFormats/Associations/src/classes_def.xml b/SimDataFormats/Associations/src/classes_def.xml
index 3c66509430337..116402321d6c1 100644
--- a/SimDataFormats/Associations/src/classes_def.xml
+++ b/SimDataFormats/Associations/src/classes_def.xml
@@ -49,4 +49,9 @@
 
   <class name="edm::helpers::KeyVal<edm::RefProd<vector<SimCluster> >,edm::RefProd<vector<reco::CaloCluster> > >" />
   <class name="edm::helpers::KeyVal<edm::RefProd<vector<reco::CaloCluster> >,edm::RefProd<vector<SimCluster> > >" />
+
+  <class name="TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > >" /> 
+  <class name="std::vector<TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > >" /> 
+  <class name="edm::Ref<std::vector<TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > > >" />
+  <class name="edm::Wrapper<std::vector<TTTrackTruthPair<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>,Phase2TrackerDigi,edm::refhelper::FindForDetSetVector<Phase2TrackerDigi> > > > >" />
 </lcgdict>