diff --git a/docs/docs/10.3-class-name-manipulation.md b/docs/docs/10.3-class-name-manipulation.md
index e898646398c71..15b41101e6f16 100644
--- a/docs/docs/10.3-class-name-manipulation.md
+++ b/docs/docs/10.3-class-name-manipulation.md
@@ -6,6 +6,10 @@ prev: two-way-binding-helpers.html
 next: test-utils.html
 ---
 
+> NOTE:
+>
+> This module now exists independently at [JedWatson/classnames](https://github.com/JedWatson/classnames) and is React-agnostic. The add-on here will thus be removed in the future.
+
 `classSet()` is a neat utility for easily manipulating the DOM `class` string.
 
 Here's a common scenario and its solution without `classSet()`: