diff --git a/Detectors/GlobalTracking/src/MatchTPCITS.cxx b/Detectors/GlobalTracking/src/MatchTPCITS.cxx
index e16031f641829..7e3f8d9f78fc9 100644
--- a/Detectors/GlobalTracking/src/MatchTPCITS.cxx
+++ b/Detectors/GlobalTracking/src/MatchTPCITS.cxx
@@ -245,8 +245,8 @@ void MatchTPCITS::init()
   }
 #endif
 
-  if (mParams->runAfterBurner) { // only used in AfterBurner
-    mRGHelper.init();            // prepare helper for TPC track / ITS clusters matching
+  if (mParams->runAfterBurner) {            // only used in AfterBurner
+    mRGHelper.init(mParams->lowestLayerAB); // prepare helper for TPC track / ITS clusters matching
   }
 
   clear();
diff --git a/Detectors/ITSMFT/ITS/reconstruction/include/ITSReconstruction/RecoGeomHelper.h b/Detectors/ITSMFT/ITS/reconstruction/include/ITSReconstruction/RecoGeomHelper.h
index f9d3f1ae46752..a7d814f02d011 100644
--- a/Detectors/ITSMFT/ITS/reconstruction/include/ITSReconstruction/RecoGeomHelper.h
+++ b/Detectors/ITSMFT/ITS/reconstruction/include/ITSReconstruction/RecoGeomHelper.h
@@ -103,7 +103,7 @@ struct RecoGeomHelper {
   static constexpr float ladderWidth() { return o2::itsmft::SegmentationAlpide::SensorSizeRows; }
   static constexpr float ladderWidthInv() { return 1. / ladderWidth(); }
 
-  void init();
+  void init(int minLayer = 0, int maxLayer = getNLayers());
   void print() const;
 
   ClassDefNV(RecoGeomHelper, 0);
diff --git a/Detectors/ITSMFT/ITS/reconstruction/src/RecoGeomHelper.cxx b/Detectors/ITSMFT/ITS/reconstruction/src/RecoGeomHelper.cxx
index 8f2efef0b34cd..712ec6a022d16 100644
--- a/Detectors/ITSMFT/ITS/reconstruction/src/RecoGeomHelper.cxx
+++ b/Detectors/ITSMFT/ITS/reconstruction/src/RecoGeomHelper.cxx
@@ -229,9 +229,9 @@ void RecoGeomHelper::RecoLayer::print() const
 }
 
 //_____________________________________________________________________
-void RecoGeomHelper::init()
+void RecoGeomHelper::init(int minLayer, int maxLayer)
 {
-  for (int il = int(layers.size()); il--;) {
+  for (int il = maxLayer; --il >= minLayer;) {
     auto& lr = layers[il];
     lr.id = il;
     lr.init();