Index: /trunk/MagicSoft/Mars/mpedestal/MPedCalcPedRun.cc
===================================================================
--- /trunk/MagicSoft/Mars/mpedestal/MPedCalcPedRun.cc	(revision 4007)
+++ /trunk/MagicSoft/Mars/mpedestal/MPedCalcPedRun.cc	(revision 4008)
@@ -403,5 +403,5 @@
           fWindowSizeLoGain += fWindowSizeHiGain;
           fWindowSizeHiGain  = 0;
-          fLoGainFirst       = diff;
+          fLoGainFirst       = diff-1;
         }
     }