diff --git a/docs/bundler/index.md b/docs/bundler/index.md
index d83631f93b..147350c750 100644
--- a/docs/bundler/index.md
+++ b/docs/bundler/index.md
@@ -43,7 +43,7 @@ Let's build our first bundle. You have the following two files, which implement
 import * as ReactDOM from 'react-dom/client';
 import {Component} from "./Component"
 
-const root = ReactDOM.createRoot(document.getElementById('root'));
+const root = ReactDOM.createRoot(document.getElementById('root')!);
 root.render(<Component message="Sup!" />)
 ```