(no commit message)

diff --git a/MagickCore/attribute.c b/MagickCore/attribute.c
index 7bb7d99d1570557981a25fae5794de9c81cfe1cd..0fc9cd87168590caab561f67b93713edc2ccfd5d 100644 (file)
--- a/MagickCore/attribute.c
+++ b/MagickCore/attribute.c
@@ -867,7 +867,8 @@ MagickExport MagickBooleanType SetImageDepth(Image *image,
         traits=GetPixelChannelMapTraits(image,channel);
         if (traits == UndefinedPixelTrait)
           continue;
-        q[i]=ScaleAnyToQuantum(ScaleQuantumToAny(q[i],range),range);
+        if (channel != IndexPixelChannel)
+          q[i]=ScaleAnyToQuantum(ScaleQuantumToAny(q[i],range),range);
       }
       q+=GetPixelChannels(image);
     }