diff --git a/DataFormats/common/include/CommonDataFormat/TFIDInfo.h b/DataFormats/common/include/CommonDataFormat/TFIDInfo.h
index 9628b38b95fa3..3d4968d7235bb 100644
--- a/DataFormats/common/include/CommonDataFormat/TFIDInfo.h
+++ b/DataFormats/common/include/CommonDataFormat/TFIDInfo.h
@@ -39,7 +39,7 @@ struct TFIDInfo { // helper info to patch DataHeader
     runNumber = runNumber_;
     startTime = startTime_;
     creation = creation_;
-    discard = (firstTForbit < tfCounter) || firstTForbit == -1U || creation == -1;
+    discard = (firstTForbit < tfCounter) || firstTForbit == -1U || creation == -1UL;
   }
 
   ClassDefNV(TFIDInfo, 3);