diff --git a/install.php b/install.php
index ffa55f8..40edc2b 100644
--- a/install.php
+++ b/install.php
@@ -667,7 +667,8 @@ MySQLDatabase::set_connection_charset('utf8');
 // downloaded from http://www.silverstripe.com/themes/
 SSViewer::set_theme('$theme');
 
-?>
+// enable nested URLs for this site (e.g. page/sub-page/)
+SiteTree::enable_nested_urls();
 PHP
 			);
 
@@ -703,7 +704,8 @@ Director::set_dev_servers($devServers);
 // downloaded from http://www.silverstripe.com/themes/
 SSViewer::set_theme('$theme');
 
-?>
+// enable nested URLs for this site (e.g. page/sub-page/)
+SiteTree::enable_nested_urls();
 PHP
 			);
 		}
diff --git a/mysite/_config.php b/mysite/_config.php
index d36f9d2..ba9066a 100644
--- a/mysite/_config.php
+++ b/mysite/_config.php
@@ -14,4 +14,5 @@ MySQLDatabase::set_connection_charset('utf8');
 // downloaded from http://www.silverstripe.com/themes/
 SSViewer::set_theme('blackcandy');
 
-?>
+// enable nested URLs for this site (e.g. page/sub-page/)
+SiteTree::enable_nested_urls();
\ No newline at end of file