(no commit message)

diff --git a/MagickCore/threshold.c b/MagickCore/threshold.c
index 795d1ba281afc4b796e53b97f37ed8117763dce0..4536769b743a80acf0f866768036cead322323fc 100644 (file)
--- a/MagickCore/threshold.c
+++ b/MagickCore/threshold.c
@@ -777,7 +777,7 @@ MagickExport MagickBooleanType ClampImage(Image *image,ExceptionInfo *exception)
       {
         PixelChannel channel=GetPixelChannelChannel(image,i);
         PixelTrait traits=GetPixelChannelTraits(image,channel);
-        if (traits == UndefinedPixelTrait)
+        if ((traits & UpdatePixelTrait) == 0)
           continue;
         q[i]=ClampPixel(q[i]);
       }