...

diff --git a/MagickCore/image.c b/MagickCore/image.c
index 43c406486f89f13b360754de5a4e9bf20996a36c..4ad6084e864a1dfb61931585f74b7a6d4d5f52cb 100644 (file)
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -3084,12 +3084,12 @@ MagickExport MagickBooleanType SetImageMask(Image *image,const PixelMask type,
       {
         case WritePixelMask:
         {
-          SetPixelWriteMask(image,ClampToQuantum(QuantumRange-intensity),q);
+          SetPixelWriteMask(image,ClampToQuantum(intensity),q);
           break;
         }
         default:
         {
-          SetPixelReadMask(image,ClampToQuantum(QuantumRange-intensity),q);
+          SetPixelReadMask(image,ClampToQuantum(intensity),q);
           break;
         }
       }