diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
index 088d238883..4d27b9dea6 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
@@ -368,7 +368,7 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 							'type'        => 'boolean',
 						),
 						'show_in_nav_menus' => array(
-							'description' => __( 'Whether to make the post type is available for selection in navigation menus.' ),
+							'description' => __( 'Whether to make the post type available for selection in navigation menus.' ),
 							'type'        => 'boolean',
 						),
 					),
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3c04d38e55..edfbd080d9 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-52830';
+$wp_version = '6.0-alpha-52831';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.