Index: /trunk/MagicSoft/Mars/mraw/MRawEvtHeader.h
===================================================================
--- /trunk/MagicSoft/Mars/mraw/MRawEvtHeader.h	(revision 5799)
+++ /trunk/MagicSoft/Mars/mraw/MRawEvtHeader.h	(revision 5800)
@@ -121,5 +121,5 @@
     UInt_t     GetCalibrationPattern() const;
 
-    void       SetCalibrationPattern(UInt_t pat) { fTrigPattern[1] += (pat << 16); } // USE THIS FUNCTION WITH EXTREME CARE -- IT IS A WORKAROUND!
+    void       SetCalibrationPattern(UInt_t pat) { fTrigPattern[1] = (pat << 16); } // USE THIS FUNCTION WITH EXTREME CARE -- IT IS A WORKAROUND!
 
     UShort_t   GetPowerOfContLight() const;