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diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index dd4e08a192fe54eb393ec2d6ec80e50e1c11c2ac..0994fa31db6d1cf1d1eaa55cc78bfb54f0d0e998 100644 (file)
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -1404,7 +1404,7 @@ MagickExport Image *ConvolveImage(const Image *image,
           pixels+=image->columns*channels;
         }
         gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
-        SetPixelChannel(convolve_image,channel,ClampToQuantum(gamma*pixel),q);
+        q[channel]=ClampToQuantum(gamma*pixel);
       }
       p+=channels;
       q+=convolve_channels;