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diff --git a/coders/tiff.c b/coders/tiff.c
index b60b09b7a27b8e264f9b874ca320637261c8fbd4..7768b7d2bd0e71018f4ef856ecf7aba3c65fd06c 100644 (file)
--- a/coders/tiff.c
+++ b/coders/tiff.c
@@ -1566,7 +1566,8 @@ static Image *ReadTIFFImage(const ImageInfo *image_info,
             q->green=ScaleCharToQuantum((unsigned char) TIFFGetG(*p));
             q->blue=ScaleCharToQuantum((unsigned char) TIFFGetB(*p));
             if (image->matte != MagickFalse)
-              q->opacity=ScaleCharToQuantum((unsigned char) TIFFGetA(*p));
+              q->opacity=(Quantum) (QuantumRange-
+                ScaleCharToQuantum((unsigned char) TIFFGetA(*p)));
             p--;
             q--;
           }