Index: wp-admin/includes/class-wp-comments-list-table.php
===================================================================
--- wp-admin/includes/class-wp-comments-list-table.php	(revision 20249)
+++ wp-admin/includes/class-wp-comments-list-table.php	(working copy)
@@ -136,7 +136,7 @@
 	}
 
 	function get_views() {
-		global $post_id, $comment_status;
+		global $post_id, $comment_status, $comment_type;
 
 		$status_links = array();
 		$num_comments = ( $post_id ) ? wp_count_comments( $post_id ) : wp_count_comments();