diff --git a/lib/browser/api/menu.js b/lib/browser/api/menu.js
index 28f51ca6be67..9615962ac66b 100644
--- a/lib/browser/api/menu.js
+++ b/lib/browser/api/menu.js
@@ -152,7 +152,7 @@ Menu.prototype.popup = function (window, x, y, positioningItem) {
     positioningItem = y
     y = x
     x = window
-    window = BrowserWindow.getFocusedWindow()
+    window = null
   }
 
   // menu.popup(window, {})
@@ -164,6 +164,9 @@ Menu.prototype.popup = function (window, x, y, positioningItem) {
     asyncPopup = options.async
   }
 
+  // Default to showing in focused window.
+  if (window == null) window = BrowserWindow.getFocusedWindow()
+
   // Default to showing under mouse location.
   if (typeof x !== 'number') x = -1
   if (typeof y !== 'number') y = -1