From 8f76ccdf9c7bac259c62dd3494a2b4afa1e5e805 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Wed, 8 Oct 2014 11:37:05 +0000
Subject: [PATCH]

---
 MagickCore/channel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index 81fcf4d34..659b6c1ba 100644
--- a/MagickCore/channel.c
+++ b/MagickCore/channel.c
@@ -1074,6 +1074,8 @@ MagickExport MagickBooleanType SetImageAlphaChannel(Image *image,
     }
     case DeactivateAlphaChannel:
     {
+      if (image->alpha_trait == UndefinedPixelTrait)
+        status=SetImageAlpha(image,OpaqueAlpha,exception);
       image->alpha_trait=CopyPixelTrait;
       break;
     }
-- 
2.40.0