diff --git a/3rdparty/libtiff/tif_dirread.c b/3rdparty/libtiff/tif_dirread.c
index ba127ca917..45c1107697 100644
--- a/3rdparty/libtiff/tif_dirread.c
+++ b/3rdparty/libtiff/tif_dirread.c
@@ -4371,7 +4371,7 @@ static void
 TIFFReadDirectoryCheckOrder(TIFF* tif, TIFFDirEntry* dir, uint16 dircount)
 {
 	static const char module[] = "TIFFReadDirectoryCheckOrder";
-	uint16 m;
+	uint32 m;
 	uint16 n;
 	TIFFDirEntry* o;
 	m=0;