diff --git a/MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/MdtRawDataMonitoring/src/MdtRawDataValAlg.cxx b/MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/MdtRawDataMonitoring/src/MdtRawDataValAlg.cxx
index 1f3e2a20d0d77bff7dee1defdfb9923b86062361..293357905076a8fc6cc24bd8fa0b3646047580da 100755
--- a/MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/MdtRawDataMonitoring/src/MdtRawDataValAlg.cxx
+++ b/MuonSpectrometer/MuonValidation/MuonDQA/MuonRawDataMonitoring/MdtRawDataMonitoring/src/MdtRawDataValAlg.cxx
@@ -1916,7 +1916,7 @@ StatusCode MdtRawDataValAlg::fillMDTSummaryHistograms( const Muon::MdtPrepData*
     if(ilayer != 3) m_mdtoccvslb[iregion][ilayer]->Fill(m_lumiblock,get_bin_for_LB_hist(iregion,ilayer,stationPhi,stationEta,isBIM));
     else m_mdtoccvslb[iregion][2]->Fill(m_lumiblock,get_bin_for_LB_hist(iregion,ilayer,stationPhi,stationEta,isBIM)); // Put extras in with outer
 
-    m_mdtoccvslb_summaryPerSector->Fill(m_lumiblock,  stationPhi+iregion*16+1  );
+    m_mdtoccvslb_summaryPerSector->Fill(m_lumiblock,  stationPhi+iregion*16  );
 
     
     //correct readout crate info for BEE,BIS7/8