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diff --git a/MagickCore/colorspace-private.h b/MagickCore/colorspace-private.h
index 6848bc2bca02f046784ed89a20fea046f0f3f98b..79fd6621f31e080d3148858fc393232c5eb0f3c6 100644 (file)
--- a/MagickCore/colorspace-private.h
+++ b/MagickCore/colorspace-private.h
@@ -60,8 +60,9 @@ static inline void ConvertRGBToCMYK(PixelInfo *pixel)
       green=QuantumScale*DecodePixelGamma(pixel->green);
       blue=QuantumScale*DecodePixelGamma(pixel->blue);
     }
-  if ((fabs(red) < MagickEpsilon) && (fabs(green) < MagickEpsilon) &&
-      (fabs(blue) < MagickEpsilon))
+  if ((fabs((double) red) < MagickEpsilon) &&
+      (fabs((double) green) < MagickEpsilon) &&
+      (fabs((double) blue) < MagickEpsilon))
     {
       pixel->black=(MagickRealType) QuantumRange;
       return;