diff --git a/lib/renderer/override.js b/lib/renderer/override.js
index 896103b6c1f7..07f02566bccc 100644
--- a/lib/renderer/override.js
+++ b/lib/renderer/override.js
@@ -6,12 +6,13 @@ const remote = require('electron').remote
 // Cache browser window visibility
 var _isVisible = true
 var _isMinimized = false
-;(function () {
+var initWindow = function initWindow () {
   var currentWindow
   currentWindow = remote.getCurrentWindow()
   _isVisible = currentWindow.isVisible()
   _isMinimized = currentWindow.isMinimized()
-})()
+}
+initWindow()
 
 // Helper function to resolve relative url.
 var a = window.top.document.createElement('a')