diff --git a/DataFormats/Detectors/FIT/FDD/include/DataFormatsFDD/Digit.h b/DataFormats/Detectors/FIT/FDD/include/DataFormatsFDD/Digit.h
index b37a060202351..b180ea823aa1c 100644
--- a/DataFormats/Detectors/FIT/FDD/include/DataFormatsFDD/Digit.h
+++ b/DataFormats/Detectors/FIT/FDD/include/DataFormatsFDD/Digit.h
@@ -83,7 +83,7 @@ struct Digit {
     LOG(info) << "Ref first: " << ref.getFirstEntry() << "| Ref entries: " << ref.getEntries();
     mTriggers.printLog();
   }
-  ClassDefNV(Digit, 3);
+  ClassDefNV(Digit, 4);
 };
 //For TCM extended mode (calibration mode), TCMdataExtended digit
 struct TriggersExt {
diff --git a/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/Digit.h b/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/Digit.h
index 6f961d59f3ebc..2b7758eeac1f5 100644
--- a/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/Digit.h
+++ b/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/Digit.h
@@ -98,7 +98,7 @@ struct Digit {
     return std::tie(ref, mTriggers, mIntRecord) == std::tie(other.ref, other.mTriggers, other.mIntRecord);
   }
   void printLog() const;
-  ClassDefNV(Digit, 6);
+  ClassDefNV(Digit, 7);
 };
 
 //For TCM extended mode (calibration mode), TCMdataExtended digit