diff --git a/lib/browser/api/dialog.js b/lib/browser/api/dialog.js
index 9b43b7b936db..a41d1fa46e0c 100644
--- a/lib/browser/api/dialog.js
+++ b/lib/browser/api/dialog.js
@@ -21,7 +21,7 @@ var messageBoxOptions = {
 }
 
 var parseArgs = function (window, options, callback, ...args) {
-  if (!(window === null || (window != null ? window.constructor : void 0) === BrowserWindow)) {
+  if (window !== null && window.constructor !== BrowserWindow) {
     // Shift.
     [callback, options, window] = [options, window, null]
   }