diff --git a/HLTrigger/Configuration/python/customizeHLTforCMSSW.py b/HLTrigger/Configuration/python/customizeHLTforCMSSW.py
index cd5cb40268b60..1d87fe0c1011d 100644
--- a/HLTrigger/Configuration/python/customizeHLTforCMSSW.py
+++ b/HLTrigger/Configuration/python/customizeHLTforCMSSW.py
@@ -48,13 +48,20 @@ def customiseForOffline(process):
 
     return process
 
-def customiseForXXXX(process):
+def customiseHLTFor46647(process):
     for prod in producers_by_type(process, 'CtfSpecialSeedGenerator'):
         if hasattr(prod, "DontCountDetsAboveNClusters"):
             value = prod.DontCountDetsAboveNClusters.value()
             delattr(prod, "DontCountDetsAboveNClusters")
             # Replace it with cms.uint32
             prod.DontCountDetsAboveNClusters = cms.uint32(value)
+
+        for prod in producers_by_type(process, 'SeedCombiner'):
+            if hasattr(prod, "PairCollection"):
+                delattr(prod, "PairCollection")
+            if hasattr(prod, "TripletCollection"):
+                delattr(prod, "TripletCollection")
+
     return process
 
 # CMSSW version specific customizations
@@ -65,6 +72,6 @@ def customizeHLTforCMSSW(process, menuType="GRun"):
     # add call to action function in proper order: newest last!
     # process = customiseFor12718(process)
 
-    process = customiseForXXXX(process)
+    process = customiseHLTFor46647(process)
     
     return process
diff --git a/RecoTracker/Configuration/python/RecoTrackerP5_cff.py b/RecoTracker/Configuration/python/RecoTrackerP5_cff.py
index 81b08a72720be..0521d02a773ff 100644
--- a/RecoTracker/Configuration/python/RecoTrackerP5_cff.py
+++ b/RecoTracker/Configuration/python/RecoTrackerP5_cff.py
@@ -20,10 +20,7 @@
 from RecoTracker.TkSeedGenerator.GlobalCombinedSeeds_cff import *
 combinedP5SeedsForCTF = RecoTracker.TkSeedGenerator.GlobalCombinedSeeds_cfi.globalCombinedSeeds.clone(
     seedCollections   = ['combinatorialcosmicseedfinderP5',
-	                 'simpleCosmicBONSeeds'],
-    #backward compatibility 2.2/3.1
-    PairCollection    = cms.InputTag('combinatorialcosmicseedfinderP5'),
-    TripletCollection = cms.InputTag('simpleCosmicBONSeeds')
+	                 'simpleCosmicBONSeeds']
 )
 
 from RecoTracker.CkfPattern.CkfTrackCandidatesP5_cff import *
diff --git a/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.cc b/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.cc
index 29ae13d181762..eb7d187c4bb25 100644
--- a/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.cc
+++ b/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.cc
@@ -43,8 +43,6 @@ SeedCombiner::SeedCombiner(const edm::ParameterSet& cfg) {
   }
 }
 
-SeedCombiner::~SeedCombiner() {}
-
 void SeedCombiner::produce(edm::Event& ev, const edm::EventSetup& es) {
   // Read inputs, and count total seeds
   size_t ninputs = inputCollections_.size();
@@ -85,3 +83,10 @@ void SeedCombiner::produce(edm::Event& ev, const edm::EventSetup& es) {
   // Save result into the event
   ev.put(std::move(result));
 }
+
+void SeedCombiner::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
+  edm::ParameterSetDescription desc;
+  desc.add<std::vector<edm::InputTag> >("seedCollections", {});
+  desc.addOptional<std::vector<edm::InputTag> >("clusterRemovalInfos", {});
+  descriptions.addWithDefaultLabel(desc);
+}
diff --git a/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.h b/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.h
index 280fa6a2a6598..7410b1128628b 100644
--- a/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.h
+++ b/RecoTracker/TkSeedGenerator/plugins/SeedCombiner.h
@@ -2,9 +2,11 @@
 #define RecoTracker_TkSeedGenerator_SeedCombiner_H
 
 #include <vector>
-#include "FWCore/Framework/interface/stream/EDProducer.h"
-#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"
 #include "DataFormats/TrackerRecHit2D/interface/ClusterRemovalInfo.h"
+#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"
+#include "FWCore/Framework/interface/stream/EDProducer.h"
+#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
+#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
 #include "FWCore/Utilities/interface/InputTag.h"
 #include "FWCore/Utilities/interface/Visibility.h"
 
@@ -17,7 +19,9 @@ namespace edm {
 class dso_hidden SeedCombiner : public edm::stream::EDProducer<> {
 public:
   SeedCombiner(const edm::ParameterSet& cfg);
-  ~SeedCombiner() override;
+  ~SeedCombiner() override = default;
+
+  static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
 
   void produce(edm::Event& ev, const edm::EventSetup& es) override;