Index: wp-includes/class-wp-xmlrpc-server.php
===================================================================
--- wp-includes/class-wp-xmlrpc-server.php	(revision 20636)
+++ wp-includes/class-wp-xmlrpc-server.php	(working copy)
@@ -514,6 +514,7 @@
 	 * @access protected
 	 *
 	 * @param object $taxonomy The unprepared taxonomy data
+	 * @param array $fields The subset of post fields to return
 	 * @return array The prepared taxonomy data
 	 */
 	protected function _prepare_taxonomy( $taxonomy, $fields ) {