--- tiff-4.5.0/libtiff/tiffiop.h.orig	2023-01-04 09:58:24.947703675 +0100
+++ tiff-4.5.0/libtiff/tiffiop.h	2023-01-04 09:57:09.507303516 +0100
@@ -257,7 +257,7 @@
 #define TIFFWriteFile(tif, buf, size)                                          \
     ((*(tif)->tif_writeproc)((tif)->tif_clientdata, (buf), (size)))
 #define TIFFSeekFile(tif, off, whence)                                         \
-    ((*(tif)->tif_seekproc)((tif)->tif_clientdata, (off), (whence)))
+  	((tif)->tif_seekproc?((*(tif)->tif_seekproc)((tif)->tif_clientdata,(toff_t)(off),whence)):0)
 #define TIFFCloseFile(tif) ((*(tif)->tif_closeproc)((tif)->tif_clientdata))
 #define TIFFGetFileSize(tif) ((*(tif)->tif_sizeproc)((tif)->tif_clientdata))
 #define TIFFMapFileContents(tif, paddr, psize)                                 \