diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c
 index 1a3259c..6baa7b3 100644
 --- a/libtiff/tif_dirread.c
 +++ b/libtiff/tif_dirread.c
 @@ -5700,9 +5700,8 @@ ChopUpSingleUncompressedStrip(TIFF* tif)
          /* file is as big as needed */
          if( tif->tif_mode == O_RDONLY &&
              nstrips > 1000000 &&
 -            (tif->tif_dir.td_stripoffset[0] >= TIFFGetFileSize(tif) ||
 -             tif->tif_dir.td_stripbytecount[0] >
 -                    TIFFGetFileSize(tif) - tif->tif_dir.td_stripoffset[0]) )
 +            (offset >= TIFFGetFileSize(tif) ||
 +             stripbytes > (TIFFGetFileSize(tif) - offset) / (nstrips - 1)) )
          {
              return;
          }