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diff --git a/MagickCore/enhance.c b/MagickCore/enhance.c
index fb08f8a84f1fb8971377376184eb0a8d3b34baa5..1edd8b623818f18b90ce98ecb837929f027f9653 100644 (file)
--- a/MagickCore/enhance.c
+++ b/MagickCore/enhance.c
@@ -3350,7 +3350,8 @@ static inline double InverseScaledSigmoidal(const double a,const double b,
   const double x)
 {
   const double sig0=Sigmoidal(a,b,0.0);
-  const double argument=(Sigmoidal(a,b,1.0)-sig0)*x+sig0;
+  const double sig1=Sigmoidal(a,b,1.0);
+  const double argument=(sig1-sig0)*x+sig0;
   const double clamped=
     (
 #if defined(MAGICKCORE_HAVE_ATANH)