diff --git a/wp-includes/rewrite.php b/wp-includes/rewrite.php
index 3feeb3737..418cc7484 100644
--- a/wp-includes/rewrite.php
+++ b/wp-includes/rewrite.php
@@ -621,8 +621,6 @@ class WP_Rewrite {
 					'%second%',
 					'%postname%',
 					'%post_id%',
-					'%category%',
-					'%tag%',
 					'%author%',
 					'%pagename%',
 					'%search%'