diff --git a/docs/tutorial/first-app.md b/docs/tutorial/first-app.md
index ab05c3cc79b..8c4c8cb942a 100644
--- a/docs/tutorial/first-app.md
+++ b/docs/tutorial/first-app.md
@@ -138,7 +138,7 @@ let win
 
 function createWindow () {
   // Create the browser window.
-  let win = new BrowserWindow({
+  win = new BrowserWindow({
     width: 800,
     height: 600,
     webPreferences: {