diff --git a/packages/ra-core/README.md b/packages/ra-core/README.md
index d0ba66ffdfb..756abfb8c8c 100644
--- a/packages/ra-core/README.md
+++ b/packages/ra-core/README.md
@@ -2,7 +2,7 @@
 
 Core components of [react-admin](https://marmelab.com/admin-on-rest/), a frontend Framework for building admin applications on top of REST/GraphQL services, using ES6, React.
 
-This package does not include any UI components. We also provide a default UI in the `ra-mui-materialui` package.
+This package does not include any UI components. We also provide a default UI in the [ra-ui-materialui](https://www.npmjs.com/package/ra-ui-materialui) package.
 
 ## License