diff --git a/wp-includes/class-wp-user.php b/wp-includes/class-wp-user.php
index 10965761b3..48cb47dce1 100644
--- a/wp-includes/class-wp-user.php
+++ b/wp-includes/class-wp-user.php
@@ -259,11 +259,13 @@ class WP_User {
 	}
 
 	/**
-	 * Magic method for checking the existence of a certain custom field
+	 * Magic method for checking the existence of a certain custom field.
 	 *
 	 * @since 3.3.0
-	 * @param string $key
-	 * @return bool
+	 * @access public
+	 *
+	 * @param string $key User meta key to check if set.
+	 * @return bool Whether the given user meta key is set.
 	 */
 	public function __isset( $key ) {
 		if ( 'id' == $key ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 42ca0efb65..9ad8a9c2d3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34387';
+$wp_version = '4.4-alpha-34388';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.