diff --git a/wp-admin/includes/class-walker-nav-menu-checklist.php b/wp-admin/includes/class-walker-nav-menu-checklist.php
index ea4b362bb3..f166a8803d 100644
--- a/wp-admin/includes/class-walker-nav-menu-checklist.php
+++ b/wp-admin/includes/class-walker-nav-menu-checklist.php
@@ -30,11 +30,11 @@ class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {
 	 *
 	 * @since 3.0.0
 	 *
-	 * @param string $output Used to append additional content (passed by reference).
-	 * @param int    $depth  Depth of page. Used for padding.
-	 * @param array  $args   Not used.
+	 * @param string   $output Used to append additional content (passed by reference).
+	 * @param int      $depth  Depth of page. Used for padding.
+	 * @param stdClass $args   Not used.
 	 */
-	public function start_lvl( &$output, $depth = 0, $args = array() ) {
+	public function start_lvl( &$output, $depth = 0, $args = null ) {
 		$indent  = str_repeat( "\t", $depth );
 		$output .= "\n$indent<ul class='children'>\n";
 	}
@@ -46,11 +46,11 @@ class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {
 	 *
 	 * @since 3.0.0
 	 *
-	 * @param string $output Used to append additional content (passed by reference).
-	 * @param int    $depth  Depth of page. Used for padding.
-	 * @param array  $args   Not used.
+	 * @param string   $output Used to append additional content (passed by reference).
+	 * @param int      $depth  Depth of page. Used for padding.
+	 * @param stdClass $args   Not used.
 	 */
-	public function end_lvl( &$output, $depth = 0, $args = array() ) {
+	public function end_lvl( &$output, $depth = 0, $args = null ) {
 		$indent  = str_repeat( "\t", $depth );
 		$output .= "\n$indent</ul>";
 	}
@@ -65,13 +65,13 @@ class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {
 	 * @global int        $_nav_menu_placeholder
 	 * @global int|string $nav_menu_selected_id
 	 *
-	 * @param string $output Used to append additional content (passed by reference).
-	 * @param object $item   Menu item data object.
-	 * @param int    $depth  Depth of menu item. Used for padding.
-	 * @param array  $args   Not used.
-	 * @param int    $id     Not used.
+	 * @param string   $output Used to append additional content (passed by reference).
+	 * @param WP_Post  $item   Menu item data object.
+	 * @param int      $depth  Depth of menu item. Used for padding.
+	 * @param stdClass $args   Not used.
+	 * @param int      $id     Not used.
 	 */
-	public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
+	public function start_el( &$output, $item, $depth = 0, $args = null, $id = 0 ) {
 		global $_nav_menu_placeholder, $nav_menu_selected_id;
 
 		$_nav_menu_placeholder = ( 0 > $_nav_menu_placeholder ) ? intval( $_nav_menu_placeholder ) - 1 : -1;
diff --git a/wp-admin/includes/class-walker-nav-menu-edit.php b/wp-admin/includes/class-walker-nav-menu-edit.php
index 3c984950b0..c7e690af97 100644
--- a/wp-admin/includes/class-walker-nav-menu-edit.php
+++ b/wp-admin/includes/class-walker-nav-menu-edit.php
@@ -22,11 +22,11 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 	 *
 	 * @since 3.0.0
 	 *
-	 * @param string $output Passed by reference.
-	 * @param int    $depth  Depth of menu item. Used for padding.
-	 * @param array  $args   Not used.
+	 * @param string   $output Passed by reference.
+	 * @param int      $depth  Depth of menu item. Used for padding.
+	 * @param stdClass $args   Not used.
 	 */
-	public function start_lvl( &$output, $depth = 0, $args = array() ) {}
+	public function start_lvl( &$output, $depth = 0, $args = null ) {}
 
 	/**
 	 * Ends the list of after the elements are added.
@@ -35,11 +35,11 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 	 *
 	 * @since 3.0.0
 	 *
-	 * @param string $output Passed by reference.
-	 * @param int    $depth  Depth of menu item. Used for padding.
-	 * @param array  $args   Not used.
+	 * @param string   $output Passed by reference.
+	 * @param int      $depth  Depth of menu item. Used for padding.
+	 * @param stdClass $args   Not used.
 	 */
-	public function end_lvl( &$output, $depth = 0, $args = array() ) {}
+	public function end_lvl( &$output, $depth = 0, $args = null ) {}
 
 	/**
 	 * Start the element output.
@@ -49,13 +49,13 @@ class Walker_Nav_Menu_Edit extends Walker_Nav_Menu {
 	 *
 	 * @global int $_wp_nav_menu_max_depth
 	 *
-	 * @param string $output Used to append additional content (passed by reference).
-	 * @param object $item   Menu item data object.
-	 * @param int    $depth  Depth of menu item. Used for padding.
-	 * @param array  $args   Not used.
-	 * @param int    $id     Not used.
+	 * @param string   $output Used to append additional content (passed by reference).
+	 * @param WP_Post  $item   Menu item data object.
+	 * @param int      $depth  Depth of menu item. Used for padding.
+	 * @param stdClass $args   Not used.
+	 * @param int      $id     Not used.
 	 */
-	public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
+	public function start_el( &$output, $item, $depth = 0, $args = null, $id = 0 ) {
 		global $_wp_nav_menu_max_depth;
 		$_wp_nav_menu_max_depth = $depth > $_wp_nav_menu_max_depth ? $depth : $_wp_nav_menu_max_depth;
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8fe5ffc7e7..b4b320da0d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-47188';
+$wp_version = '5.4-alpha-47189';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.