diff --git a/inc/cache.php b/inc/cache.php
index 7a66049f43927093a0ca0a0a73f861d680a13268..6817e771ba205b9c2ed63895e7de911842048987 100644
--- a/inc/cache.php
+++ b/inc/cache.php
@@ -178,6 +178,7 @@ class cache_parser extends cache {
 
     public $file = '';       // source file for cache
     public $mode = '';       // input mode (represents the processing the input file will undergo)
+    public $page = '';
 
     var $_event = 'PARSER_CACHE_USE';