diff --git a/docs/api/menu.md b/docs/api/menu.md
index 7b563d578014..ca35d4bb42a0 100644
--- a/docs/api/menu.md
+++ b/docs/api/menu.md
@@ -239,16 +239,15 @@ will become properties of the constructed menu items.
 
 ### `Menu.popup([browserWindow, x, y, positioningItem])`
 
-* `browserWindow` BrowserWindow (optional)
-* `x` Number (optional)
-* `y` Number (**required** if `x` is used)
-* `positioningItem` Number (optional) _OS X_
+* `browserWindow` BrowserWindow (optional) - Default is `null`.
+* `x` Number (optional) - Default is -1.
+* `y` Number (**required** if `x` is used) - Default is -1.
+* `positioningItem` Number (optional) _OS X_ - the index of the menu item to
+  be positioned under the mouse cursor at the specified coordinates.
 
-Pops up this menu as a context menu in the `browserWindow`. You
-can optionally provide a `x,y` coordinate to place the menu at, otherwise it
-will be placed at the current mouse cursor position. `positioningItem` is the
-index of the menu item to be positioned under the mouse cursor at the specified
-coordinates (only supported on OS X).
+Pops up this menu as a context menu in the `browserWindow`. You can optionally
+provide a `x, y` coordinate to place the menu at, otherwise it will be placed
+at the current mouse cursor position.
 
 ### `Menu.append(menuItem)`