Index: wp-includes/general-template.php
===================================================================
--- wp-includes/general-template.php	(revision 22467)
+++ wp-includes/general-template.php	(working copy)
@@ -1665,7 +1665,8 @@
 		$href = get_search_feed_link();
 	} elseif ( is_post_type_archive() ) { 
 		$title = sprintf( $args['posttypetitle'], get_bloginfo('name'), $args['separator'], post_type_archive_title( '', false ) ); 
-		$href = get_post_type_archive_feed_link( get_post_type() ); 
+		$post_type_obj = get_queried_object();
+   		$href = get_post_type_archive_feed_link( $post_type_obj->name );
 	} 
 
 	if ( isset($title) && isset($href) )