diff --git a/docs/tutorial/using-pepper-flash-plugin.md b/docs/tutorial/using-pepper-flash-plugin.md
index bbb37862da4..20b29c4114a 100644
--- a/docs/tutorial/using-pepper-flash-plugin.md
+++ b/docs/tutorial/using-pepper-flash-plugin.md
@@ -23,8 +23,9 @@ var mainWindow = null;
 
 // Quit when all windows are closed.
 app.on('window-all-closed', function() {
-  if (process.platform != 'darwin')
+  if (process.platform != 'darwin') {
     app.quit();
+  }
 });
 
 // Specify flash path.