diff --git a/docusaurus/docs/adding-custom-environment-variables.md b/docusaurus/docs/adding-custom-environment-variables.md
index 48bfea2cf64..49b30a1586e 100644
--- a/docusaurus/docs/adding-custom-environment-variables.md
+++ b/docusaurus/docs/adding-custom-environment-variables.md
@@ -164,3 +164,4 @@ DOMAIN=www.example.com
 REACT_APP_FOO=$DOMAIN/foo
 REACT_APP_BAR=$DOMAIN/bar
 ```
+Note: for the moment this option of exapanding is not working (https://github.com/facebook/create-react-app/issues/8538)