diff --git a/docs/Introduction.md b/docs/Introduction.md
index 90a30a5b30..2e501d99c7 100644
--- a/docs/Introduction.md
+++ b/docs/Introduction.md
@@ -29,7 +29,7 @@ const App = React.createClass({
   },
 
   render() {
-    const Child
+    let Child
     switch (this.state.route) {
       case '/about': Child = About; break;
       case '/inbox': Child = Inbox; break;