https://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=34605

diff --git a/coders/tiff.c b/coders/tiff.c
index 7098a6da07c3de84d1d5e0b02e2087c636f29541..36877488d1d6dde1b23f41fc030927e5df9ca2ca 100644 (file)
--- a/coders/tiff.c
+++ b/coders/tiff.c
@@ -3534,13 +3534,11 @@ static MagickBooleanType WriteTIFFImage(const ImageInfo *image_info,
       case FaxCompression:
       {
         compress_tag=COMPRESSION_CCITTFAX3;
-        SetQuantumMinIsWhite(quantum_info,MagickTrue);
         break;
       }
       case Group4Compression:
       {
         compress_tag=COMPRESSION_CCITTFAX4;
-        SetQuantumMinIsWhite(quantum_info,MagickTrue);
         break;
       }
 #if defined(COMPRESSION_JBIG)