(no commit message)

diff --git a/MagickCore/threshold.c b/MagickCore/threshold.c
index 33c394e4c4b35d12e789b266ee8edc31f289b30d..364f0f35cca9a35859474136f4b8c8d927d501cf 100644 (file)
--- a/MagickCore/threshold.c
+++ b/MagickCore/threshold.c
@@ -437,7 +437,7 @@ MagickExport MagickBooleanType BilevelImage(Image *image,const double threshold,
         traits=GetPixelChannelMapTraits(image,channel);
         if ((traits & UpdatePixelTrait) == 0)
           continue;
-        if ((image->channel_mask & SyncChannels) == 0)
+        if (image->channel_mask == DefaultChannels)
           pixel=q[i];
         q[i]=(Quantum) (pixel <= threshold ? 0 : QuantumRange);
       }