diff --git a/wp-includes/class-wp-roles.php b/wp-includes/class-wp-roles.php
index e696bc9fb9..18b0d55035 100644
--- a/wp-includes/class-wp-roles.php
+++ b/wp-includes/class-wp-roles.php
@@ -28,7 +28,7 @@ class WP_Roles {
 	 * List of roles and capabilities.
 	 *
 	 * @since 2.0.0
-	 * @var array
+	 * @var array[]
 	 */
 	public $roles;
 
@@ -36,7 +36,7 @@ class WP_Roles {
 	 * List of the role objects.
 	 *
 	 * @since 2.0.0
-	 * @var array
+	 * @var WP_Role[]
 	 */
 	public $role_objects = array();
 
@@ -44,7 +44,7 @@ class WP_Roles {
 	 * List of role names.
 	 *
 	 * @since 2.0.0
-	 * @var array
+	 * @var string[]
 	 */
 	public $role_names = array();
 
@@ -254,7 +254,7 @@ class WP_Roles {
 	 *
 	 * @since 2.0.0
 	 *
-	 * @return array List of role names.
+	 * @return string[] List of role names.
 	 */
 	public function get_names() {
 		return $this->role_names;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e0021a95aa..1b14bb4bf4 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-42866';
+$wp_version = '5.0-alpha-42870';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.