diff --git a/Detectors/ITSMFT/ITS/tracking/include/ITStracking/TrackHelpers.h b/Detectors/ITSMFT/ITS/tracking/include/ITStracking/TrackHelpers.h
index 28bf4051fcc5f..7fa842f078dfc 100644
--- a/Detectors/ITSMFT/ITS/tracking/include/ITStracking/TrackHelpers.h
+++ b/Detectors/ITSMFT/ITS/tracking/include/ITStracking/TrackHelpers.h
@@ -167,11 +167,12 @@ GPUdi() bool fitTrack(TrackITSInternal<NLayers>& trk,
                       o2::track::TrackPar* linRef = nullptr)
 {
   for (int iLayer{start}; iLayer != end; iLayer += step) {
-    if (trk.getClusterIndex(iLayer) == constants::UnusedIndex) {
+    const int clsIdx = trk.getClusterIndex(iLayer);
+    if (clsIdx == constants::UnusedIndex) {
       continue;
     }
 
-    const TrackingFrameInfo& trackingHit = ctx.tfInfos[iLayer][trk.getClusterIndex(iLayer)];
+    const TrackingFrameInfo& trackingHit = ctx.tfInfos[iLayer][clsIdx];
     if (linRef) {
       if (!param.o2::track::TrackParCovF::rotate(trackingHit.alphaTrackingFrame, *linRef, ctx.bz)) {
         return false;