Index: trunk/MagicSoft/Mars/manalysis/MBlindPixels.h
===================================================================
--- trunk/MagicSoft/Mars/manalysis/MBlindPixels.h	(revision 1966)
+++ trunk/MagicSoft/Mars/manalysis/MBlindPixels.h	(revision 1967)
@@ -23,5 +23,5 @@
     void Clear(Option_t *o="")  { fPixels.Reset(); }
 
-    Bool_t IsBlind(UShort_t id) { return fPixels.GetSize() && fPixels[id]; }
+    Bool_t IsBlind(UShort_t id) const { return fPixels.GetSize() && ((TArrayC)fPixels)[id]; }
 
     ClassDef(MBlindPixels, 1) // container to store blind pixels