diff --git a/docs/frontend-system/architecture/25-extension-overrides.md b/docs/frontend-system/architecture/25-extension-overrides.md
index a72eefdf9d..0da2ed6eef 100644
--- a/docs/frontend-system/architecture/25-extension-overrides.md
+++ b/docs/frontend-system/architecture/25-extension-overrides.md
@@ -302,3 +302,5 @@ const app = createApp({
 
 export default app.createRoot();
 ```
+
+You must define a `pluginId` when creating a frontend module, and the plugin must also be installed for the module to be loaded.