(no commit message)

diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index a1b8873d050072b71db221f943ad51324fe9ea81..6a84194d2ea17c966d6ac5c5e18595d3119ea112 100644 (file)
--- a/MagickCore/channel.c
+++ b/MagickCore/channel.c
@@ -1151,6 +1151,7 @@ MagickExport MagickBooleanType SetImageAlphaChannel(Image *image,
     {
       status=CompositeImage(image,image,AlphaCompositeOp,MagickTrue,0,0,
         exception);
+      image->alpha_trait=UndefinedPixelTrait;
       break;
     }
     case OpaqueAlphaChannel: