diff --git a/_config.php b/_config.php
index 07af9ac..ed63b03 100644
--- a/_config.php
+++ b/_config.php
@@ -1,10 +1,5 @@
 <?php
 
-// add the extension to pages
-if (class_exists('SiteTree')) {
-	SiteTree::add_extension('GoogleSitemapSiteTreeExtension');
-}
-
 // if you need to add this to DataObjects include the following in
 // your own _config: