diff --git a/wp-includes/feed.php b/wp-includes/feed.php
index e6b9ae0e68..4f775aa799 100644
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -83,7 +83,7 @@ function get_wp_title_rss($sep = '»') {
 	$title = wp_title($sep, false);
 	if ( is_wp_error( $title ) )
 		return $title->get_error_message();
-	$title = apply_filters('get_wp_title_rss', $title);
+	$title = apply_filters( 'get_wp_title_rss', $title, $sep );
 	return $title;
 }
 
@@ -98,8 +98,8 @@ function get_wp_title_rss($sep = '»') {
  *
  * @param string $sep Optional.
  */
-function wp_title_rss($sep = '»') {
-	echo apply_filters('wp_title_rss', get_wp_title_rss($sep));
+function wp_title_rss( $sep = '»' ) {
+	echo apply_filters( 'wp_title_rss', get_wp_title_rss( $sep ), $sep );
 }
 
 /**