Index: trunk/MagicSoft/Mars/mpedestal/MPedPhotCalc.cc
===================================================================
--- trunk/MagicSoft/Mars/mpedestal/MPedPhotCalc.cc	(revision 4147)
+++ trunk/MagicSoft/Mars/mpedestal/MPedPhotCalc.cc	(revision 4160)
@@ -158,9 +158,10 @@
  
        const MCerPhotPix &pix = (*fCerPhot)[i];
+       const Int_t pixidx = pix.GetPixId();
 
        const Float_t nphot = pix.GetNumPhotons();
        
-       fSumx[i]  += nphot;
-       fSumx2[i] += nphot*nphot;
+       fSumx[pixidx]  += nphot;
+       fSumx2[pixidx] += nphot*nphot;
     }