diff -up xloadimage.4.1/tiff.c.tiff4 xloadimage.4.1/tiff.c
--- xloadimage.4.1/tiff.c.tiff4	2012-05-07 18:00:10.384739299 -0400
+++ xloadimage.4.1/tiff.c	2012-05-07 18:01:16.685241646 -0400
@@ -34,14 +34,14 @@ static TIFF *is_tiff(fullname, name, inf
      struct tiff_info *info;
 {
   ZFILE *zf;
-  TIFFHeader th;
+  TIFFHeaderCommon th;
   TIFF *tiff;
 
   zf = zopen(fullname);
 
   /* read TIFF header and see if it looks right
    */
-  if ((zread(zf, (byte *)&th, sizeof(TIFFHeader)) == sizeof(TIFFHeader)) &&
+  if ((zread(zf, (byte *)&th, sizeof(TIFFHeaderCommon)) == sizeof(TIFFHeaderCommon)) &&
       ((th.tiff_magic == TIFF_BIGENDIAN) ||
        (th.tiff_magic == TIFF_LITTLEENDIAN))) {