diff --git a/_config.php b/_config.php
index bce332f..c057e27 100644
--- a/_config.php
+++ b/_config.php
@@ -5,5 +5,5 @@
 }
 
 if (class_exists('ContentController')) {
-    Object::add_extension('ContentController', 'HashPathExtension');
+    SS_Object::add_extension('ContentController', 'HashPathExtension');
 }