diff --git a/src/wp-admin/includes/template.php b/src/wp-admin/includes/template.php
index cb8000297a..b367264435 100644
--- a/src/wp-admin/includes/template.php
+++ b/src/wp-admin/includes/template.php
@@ -899,16 +899,24 @@ function page_template_dropdown( $default_template = '', $post_type = 'page' ) {
  * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int         $default_page Optional. The default page ID to be pre-selected. Default 0.
- * @param int         $parent       Optional. The parent page ID. Default 0.
+ * @param int         $parent_page  Optional. The parent page ID. Default 0.
  * @param int         $level        Optional. Page depth level. Default 0.
  * @param int|WP_Post $post         Post ID or WP_Post object.
  * @return void|false Void on success, false if the page has no children.
  */
-function parent_dropdown( $default_page = 0, $parent = 0, $level = 0, $post = null ) {
+function parent_dropdown( $default_page = 0, $parent_page = 0, $level = 0, $post = null ) {
 	global $wpdb;
 
 	$post  = get_post( $post );
-	$items = $wpdb->get_results( $wpdb->prepare( "SELECT ID, post_parent, post_title FROM $wpdb->posts WHERE post_parent = %d AND post_type = 'page' ORDER BY menu_order", $parent ) );
+	$items = $wpdb->get_results(
+		$wpdb->prepare(
+			"SELECT ID, post_parent, post_title
+			FROM $wpdb->posts
+			WHERE post_parent = %d AND post_type = 'page'
+			ORDER BY menu_order",
+			$parent_page
+		)
+	);
 
 	if ( $items ) {
 		foreach ( $items as $item ) {