From 2fd3474a54fc07d23bd775f3280d3d37e7afb4c8 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Sat, 23 May 2015 12:36:41 +0000
Subject: [PATCH]

---
 MagickCore/channel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index b468d2d04..16a884595 100644
--- 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:
-- 
2.50.1