diff --git a/PerlMagick/Magick.xs b/PerlMagick/Magick.xs
index 607ffde17ef..ea1ea2e3157 100644
--- a/PerlMagick/Magick.xs
+++ b/PerlMagick/Magick.xs
@@ -567,8 +567,8 @@ static struct
     { "Colorspace", { {"colorspace", MagickColorspaceOptions} } },
     { "AutoThreshold", { {"method", MagickAutoThresholdOptions} } },
     { "RangeThreshold", { {"geometry", StringReference},
-      {"low-soft", RealReference}, {"high-soft", RealReference},
-      {"low-hard", RealReference}, {"high-hard", RealReference},
+      {"low-black", RealReference}, {"low-white", RealReference},
+      {"high-white", RealReference}, {"high-black", RealReference},
       {"channel", MagickChannelOptions} } },
   };
 
diff --git a/PerlMagick/quantum/quantum.xs.in b/PerlMagick/quantum/quantum.xs.in
index 2f62b867fbc..14858fbedbf 100644
--- a/PerlMagick/quantum/quantum.xs.in
+++ b/PerlMagick/quantum/quantum.xs.in
@@ -567,8 +567,8 @@ static struct
     { "Colorspace", { {"colorspace", MagickColorspaceOptions} } },
     { "AutoThreshold", { {"method", MagickAutoThresholdOptions} } },
     { "RangeThreshold", { {"geometry", StringReference},
-      {"low-soft", RealReference}, {"high-soft", RealReference},
-      {"low-hard", RealReference}, {"high-hard", RealReference},
+      {"low-black", RealReference}, {"low-white", RealReference},
+      {"high-white", RealReference}, {"high-black", RealReference},
       {"channel", MagickChannelOptions} } },
   };