diff --git a/wp-includes/class-wp-user.php b/wp-includes/class-wp-user.php
index 5d57a996ff..4c206c25fd 100644
--- a/wp-includes/class-wp-user.php
+++ b/wp-includes/class-wp-user.php
@@ -324,6 +324,26 @@ class WP_User {
 		$this->data->$key = $value;
 	}
 
+	/**
+	 * Magic method for unsetting a certain custom field
+	 *
+	 * @since 4.4.0
+	 */
+	function __unset( $key ) {
+		if ( 'id' == $key ) {
+			_deprecated_argument( 'WP_User->id', '2.1', __( 'Use <code>WP_User->ID</code> instead.' ) );
+			$key = 'ID';
+		}
+
+		if ( isset( $this->data->$key ) ) {
+			unset( $this->data->$key );
+		}
+
+		if ( isset( self::$back_compat_keys[ $key ] ) ) {
+			unset( self::$back_compat_keys[ $key ] );
+		}
+	}
+
 	/**
 	 * Determine whether the user exists in the database.
 	 *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 07ee898183..2a070b31f2 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34379';
+$wp_version = '4.4-alpha-34380';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.