(no commit message)

diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index b468d2d04209ca52945af37dd453ad32a183de25..16a8845958b8892be01a21e6f847ff133ea3c1de 100644 (file)
--- a/MagickCore/channel.c
+++ b/MagickCore/channel.c
@@ -1137,6 +1137,7 @@ MagickExport MagickBooleanType SetImageAlphaChannel(Image *image,
           status=MagickFalse;
       }
       image_view=DestroyCacheView(image_view);
+      image->alpha_trait=UndefinedPixelTrait;
       return(status);
     }
     case DiscreteAlphaChannel: