From 4a959f7974b97959309f63727b3b29326bdf1242 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Mon, 30 Jan 2012 14:01:06 +0000
Subject: [PATCH]

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

diff --git a/MagickCore/image.c b/MagickCore/image.c
index 27521ab18..3a71f22fd 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -2704,6 +2704,8 @@ MagickExport MagickBooleanType SetImageBackgroundColor(Image *image,
   assert(image->signature == MagickSignature);
   if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
     return(MagickFalse);
+  if (image->background_color.matte != MagickFalse)
+    image->matte=MagickTrue;
   /*
     Set image background color.
   */
-- 
2.40.0