diff --git wp-settings.php wp-settings.php
index cb95018..cdcdc4e 100644
--- wp-settings.php
+++ wp-settings.php
@@ -40,7 +40,7 @@ if ( function_exists( 'date_default_timezone_set' ) )
 wp_unregister_GLOBALS();
 
 // Ensure these global variables do not exist so they do not interfere with WordPress.
-unset( $wp_filter, $cache_lastcommentmodified );
+unset( $cache_lastcommentmodified );
 
 // Standardize $_SERVER variables across setups.
 wp_fix_server_vars();