diff --git a/README.md b/README.md
index f60c180c..598cad4b 100644
--- a/README.md
+++ b/README.md
@@ -800,6 +800,7 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
   where `eval` or `with` are used.
 
 - `keep_classnames` (default `false`).  Pass `true` to not mangle class names.
+  See also: the `keep_classnames` [compress option](#compress-options).
 
 - `keep_fnames` (default `false`).  Pass `true` to not mangle function names.
   Useful for code relying on `Function.prototype.name`. See also: the `keep_fnames`