diff --git a/MagickCore/threshold.c b/MagickCore/threshold.c
index 668f52be0a..f55aeca64b 100644
--- a/MagickCore/threshold.c
+++ b/MagickCore/threshold.c
@@ -2147,11 +2147,11 @@ MagickExport MagickBooleanType RandomThresholdImage(Image *image,
 %
 %    o low_black: Define the minimum threshold value.
 %
-%    o low_white: Define the maximum threshold value.
+%    o low_white: Define the minimum threshold value.
 %
-%    o high_white: Define the minimum threshold value.
+%    o high_white: Define the maximum threshold value.
 %
-%    o low_white: Define the maximum threshold value.
+%    o high_black: Define the maximum threshold value.
 %
 %    o exception: return any errors or warnings in this structure.
 %