diff --git a/README.md b/README.md
index f502d3bb..e9ed6198 100644
--- a/README.md
+++ b/README.md
@@ -588,8 +588,8 @@ Allows auto enable CSS modules based on filename.
 
 Possible values:
 
-- `true` - enable css modules for all files for which `/\.module\.\w+$/i.test(filename)` return true
-- `false` - disable css modules
+- `true` - enables CSS modules or interoperable CSS format, sets the [`modules.compileType`](#compiletype) option to `module` value for all files which satisfy `/\.module(s)?\.\w+$/i.test(filename)` condition or sets the [`modules.compileType`](#compiletype) option to `icss` value for all files which satisfy `/\.icss\.\w+$/i.test(filename)` condition
+- `false` - disables CSS modules or interoperable CSS format based on filename
 
 **webpack.config.js**