diff --git a/wp-includes/rss.php b/wp-includes/rss.php
index 389a4d2393..0d70afc5eb 100644
--- a/wp-includes/rss.php
+++ b/wp-includes/rss.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once('simplepie.php');
+require_once('class-simplepie.php');
 
 class WordPress_SimplePie_Cache extends SimplePie_Cache {
 	var $name;