diff --git a/DataFormats/PatCandidates/interface/PATObject.h b/DataFormats/PatCandidates/interface/PATObject.h
index 7e78486e9b8e8..db362b95c027f 100644
--- a/DataFormats/PatCandidates/interface/PATObject.h
+++ b/DataFormats/PatCandidates/interface/PATObject.h
@@ -195,8 +195,8 @@ namespace pat {
       /// add a trigger match
       void addTriggerObjectMatch( const TriggerObjectStandAlone & trigObj ) { triggerObjectMatchesEmbedded_.push_back( trigObj ); };
       /// unpack path names of matched trigger objects (if they were packed before embedding, which is not normally the case)
-      void unpackTriggerObjectPathNames( const edm::TriggerNames &names ) const {
-        for (std::vector<TriggerObjectStandAlone>::const_iterator it = triggerObjectMatchesEmbedded_.begin(), ed = triggerObjectMatchesEmbedded_.end(); it != ed; ++it) it->unpackPathNames(names);
+      void unpackTriggerObjectPathNames( const edm::TriggerNames &names ) {
+        for (std::vector<TriggerObjectStandAlone>::iterator it = triggerObjectMatchesEmbedded_.begin(), ed = triggerObjectMatchesEmbedded_.end(); it != ed; ++it) it->unpackPathNames(names);
       }
 
       /// Returns an efficiency given its name
diff --git a/DataFormats/PatCandidates/interface/TriggerObjectStandAlone.h b/DataFormats/PatCandidates/interface/TriggerObjectStandAlone.h
index 7568f428a6ab7..f78a74027429d 100644
--- a/DataFormats/PatCandidates/interface/TriggerObjectStandAlone.h
+++ b/DataFormats/PatCandidates/interface/TriggerObjectStandAlone.h
@@ -148,9 +148,9 @@ namespace pat {
       virtual bool coll( const std::string & collName ) const { return hasCollection( collName ); };
 
       ///  pack trigger names into indices 
-      void packPathNames(const edm::TriggerNames &names) const ;
+      void packPathNames(const edm::TriggerNames &names) ;
       ///  unpack trigger names into indices 
-      void unpackPathNames(const edm::TriggerNames &names) const ;
+      void unpackPathNames(const edm::TriggerNames &names) ;
 
   };
 
diff --git a/DataFormats/PatCandidates/src/TriggerObjectStandAlone.cc b/DataFormats/PatCandidates/src/TriggerObjectStandAlone.cc
index 1d1904a3592d1..42eac43ee1102 100644
--- a/DataFormats/PatCandidates/src/TriggerObjectStandAlone.cc
+++ b/DataFormats/PatCandidates/src/TriggerObjectStandAlone.cc
@@ -261,7 +261,7 @@ bool TriggerObjectStandAlone::checkIfPathsAreUnpacked(bool throwIfPacked) const
    return unpacked;
 }
 
-void TriggerObjectStandAlone::packPathNames(const edm::TriggerNames &names) const {
+void TriggerObjectStandAlone::packPathNames(const edm::TriggerNames &names) {
     if (!pathIndices_.empty()) {
         if (!pathNames_.empty()) {
             throw cms::Exception("RuntimeError", "Error, trying to pack a partially packed TriggerObjectStandAlone");
@@ -283,12 +283,12 @@ void TriggerObjectStandAlone::packPathNames(const edm::TriggerNames &names) cons
         }
     }
     if (ok) {
-        (const_cast<std::vector<uint16_t> &>(pathIndices_)).swap(indices);
-        (const_cast<std::vector<std::string> &>(pathNames_)).clear();
+        pathIndices_.swap(indices);
+        pathNames_.clear();
     }
 }
 
-void TriggerObjectStandAlone::unpackPathNames(const edm::TriggerNames &names) const {
+void TriggerObjectStandAlone::unpackPathNames(const edm::TriggerNames &names) {
     if (!pathNames_.empty()) {
         if (!pathIndices_.empty()) {
             throw cms::Exception("RuntimeError", "Error, trying to unpack a partially unpacked TriggerObjectStandAlone");
@@ -302,7 +302,7 @@ void TriggerObjectStandAlone::unpackPathNames(const edm::TriggerNames &names) co
         if (pathIndices_[i] >= end) throw cms::Exception("RuntimeError", "Error, path index out of bounds");
         paths[i] = names.triggerName(pathIndices_[i]);
     }
-    (const_cast<std::vector<uint16_t> &>(pathIndices_)).clear();
-    (const_cast<std::vector<std::string> &>(pathNames_)).swap(paths);
+    pathIndices_.clear();
+    pathNames_.swap(paths);
 }