diff --git a/lmext1.root b/lmext1.root
index f42d7dc..bbdcc88 100644
Binary files a/lmext1.root and b/lmext1.root differ
diff --git a/src/root/RMicroFileReader.cxx b/src/root/RMicroFileReader.cxx
index 5a4ce7a..6594498 100644
--- a/src/root/RMicroFileReader.cxx
+++ b/src/root/RMicroFileReader.cxx
@@ -1223,11 +1223,8 @@ RMicroFileReader::GetNTupleProper(const char *ntupleName)
       // @Incomplete: each section has a differently-sized RBlob, we need to account for that!
       RTFString blobName { kBlobClassName };
       RTFKey dummy;
-      // FIXME: it seems that sometimes even if IsBigFile() == false we get a big header size!
-      // if (fileHeader.IsBigFile())
-         dummy.MakeBigKey();
-      fileInfo.rblob_key_header_nbytes = dummy.GetHeaderSize() + blobName.GetSize() + 2 * RTFString{}.GetSize();
-      printf("nbytes: %lu\n", fileInfo.rblob_key_header_nbytes);
+      dummy.MakeBigKey();
+      fileInfo.rblob_key_header_nbytes = dummy.fKeyHeaderSize + blobName.GetSize() + 2 * RTFString{}.GetSize();
    }
    // @----
    ReadBuffer(ntuple, objNbytes, offset);