diff --git a/StRoot/StEvent/StTriggerData2022.h b/StRoot/StEvent/StTriggerData2022.h
index 39939704b93..a38c7995cc0 100644
--- a/StRoot/StEvent/StTriggerData2022.h
+++ b/StRoot/StEvent/StTriggerData2022.h
@@ -284,7 +284,7 @@ class StTriggerData2022 : public StTriggerData {
     void swapRawDetOfflen(TrgOfflen2022* offlen);
     void swapRawDet(DataBlock2022* data, int name, int hlength, int bs);
     
-    ClassDef(StTriggerData2022,1) 
+    ClassDef(StTriggerData2022,2) 
 };
 
 inline void StTriggerData2022::swapOfflen(TrgOfflen2022* offlen)