--- OLD/libtiff/tif_dirwrite.c	Thu Jan  1 00:00:00 1970
+++ NEW/libtiff/tif_dirwrite.c	Thu Jan  1 00:00:00 1970
@@ -782,7 +782,7 @@
 		if (tif->tif_flags & TIFF_SWAB)
 			TIFFSwabLong(&nextdir);
 	} while (nextdir != 0);
-	(void) TIFFSeekFile(tif, -sizeof (nextdir), L_INCR);
+	(void) TIFFSeekFile(tif, -(toff_t)sizeof (nextdir), L_INCR);
 	if (!WriteOK(tif, &tif->tif_diroff, sizeof (tif->tif_diroff))) {
 		TIFFError(module, "Error writing directory link");
 		return (0);