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diff --git a/magick/effect.c b/magick/effect.c
index cabfcfc1440bb9dace6e7b2be7b1b35ffcb88dc0..fdd92a45f48ff80c249f7061e08b83c209883f55 100644 (file)
--- a/magick/effect.c
+++ b/magick/effect.c
@@ -799,7 +799,7 @@ static double *GetBlurKernel(unsigned long width,const MagickRealType sigma)
   {
     alpha=exp((-((double) (i*i))/(double) (2.0*KernelRank*KernelRank*
       MagickSigma*MagickSigma)));
-    kernel[(i)/KernelRank]+=(double) (alpha/(MagickSQ2PI*sigma));
+    kernel[(i+bias)/KernelRank]+=(double) (alpha/(MagickSQ2PI*sigma));
   }
   normalize=0.0;
   for (i=0; i < (long) width; i++)