diff --git wp-includes/comment-template.php wp-includes/comment-template.php
index 5144285..0d44376 100644
--- wp-includes/comment-template.php
+++ wp-includes/comment-template.php
@@ -1889,7 +1889,7 @@ class Walker_Comment extends Walker {
  * @param string|array $args {
  *     Optional. Formatting options.
  *
- *     @type string $walker            The Walker class used to list comments. Default null.
+ *     @type object $walker            Instance of a Walker class to list comments. Default null.
  *     @type int    $max_depth         The maximum comments depth. Default empty.
  *     @type string $style             The style of list ordering. Default 'ul'. Accepts 'ul', 'ol'.
  *     @type string $callback          Callback function to use. Default null.
diff --git wp-includes/nav-menu-template.php wp-includes/nav-menu-template.php
index d34dfc3..4d380a2 100644
--- wp-includes/nav-menu-template.php
+++ wp-includes/nav-menu-template.php
@@ -215,7 +215,7 @@ class Walker_Nav_Menu extends Walker {
  *     @type string        $link_after      Text after the link. Default empty.
  *     @type bool          $echo            Whether to echo the menu or return it. Default true.
  *     @type int           $depth           How many levels of the hierarchy are to be included. 0 means all. Default 0.
- *     @type string        $walker          Allows a custom walker class to be specified. Default empty.
+ *     @type object        $walker          Instance of a custom walker class. Default empty.
  *     @type string        $theme_location  Theme location to be used. Must be registered with register_nav_menu()
  *                                          in order to be selectable by the user.
  *     @type string        $items_wrap      How the list items should be wrapped. Default is a ul with an id and class.