diff --git a/core/data/trd/CbmTrdDigi.h b/core/data/trd/CbmTrdDigi.h
index 6b6a49e75a7cb9028c36cc16069eeb8ac8ffc8d2..fde30164662acd400c1318a4eba21213d255c9cd 100644
--- a/core/data/trd/CbmTrdDigi.h
+++ b/core/data/trd/CbmTrdDigi.h
@@ -203,7 +203,7 @@ private:
   static const Int_t fgkTrgOffset =  29;
   static const Int_t fgkTypOffset =  31;
   
-  ClassDefNV(CbmTrdDigi, 2);   // Production ready TRD digit
+  ClassDefNV(CbmTrdDigi, 3);   // Production ready TRD digit
 };
 
 #endif