fix tracklet fit in the reconstruction code

[u/mrichter/AliRoot.git] / TRD / AliTRDseedV1.cxx

diff --git a/TRD/AliTRDseedV1.cxx b/TRD/AliTRDseedV1.cxx
index 1d750f44812b7e90de3aedbdccae28632c8a931b..4b2ee0c30702f38e264fd1708338838cf87ef3ed 100644 (file)
--- a/TRD/AliTRDseedV1.cxx
+++ b/TRD/AliTRDseedV1.cxx
@@ -468,7 +468,7 @@ Bool_t      AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t
       // update x reference positions (calibration/alignment aware)
       for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
         if(!fClusters[iTime]) continue;
-        fX[iTime] = fClusters[iTime]->GetX() - fX0;
+        fX[iTime] = fX0 - fClusters[iTime]->GetX();
       } 
       
       AliTRDseed::Update();