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diff --git a/MagickCore/pixel-accessor.h b/MagickCore/pixel-accessor.h
index 6e2dd59a02bd89e3bfdc1e02a4587708b75ba114..4978cd14f99987990bfd1eea0a4aa21b0d11fa61 100644 (file)
--- a/MagickCore/pixel-accessor.h
+++ b/MagickCore/pixel-accessor.h
@@ -91,7 +91,7 @@ static inline PixelChannel GetPixelChannelMapChannel(
   return(image->channel_map[offset].channel);
 }
 
-static inline int GetPixelChannelMapOffset(const Image *restrict image,
+static inline ssize_t GetPixelChannelMapOffset(const Image *restrict image,
   const PixelChannel channel)
 {
   return(image->channel_map[channel].offset);