diff --git a/wp-includes/feed.php b/wp-includes/feed.php
index f24beb7761..be76e15d8e 100644
--- a/wp-includes/feed.php
+++ b/wp-includes/feed.php
@@ -154,7 +154,7 @@ function get_the_category_rss($type = 'rss') {
 		if ( 'rdf' == $type )
 			$the_list .= "\n\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
 		if ( 'atom' == $type )
-			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', attribute_escape( apply_filters( 'get_bloginfo_rss', get_bloginfo( 'url' ) ) ), attribute_escape( $category->cat_name ) );
+			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', attribute_escape( apply_filters( 'get_bloginfo_rss', get_bloginfo( 'url' ) ) ), attribute_escape( $category->name ) );
 		else
 			$the_list .= "\n\t\t<category><![CDATA[$cat_name]]></category>\n";
 	}