diff --git a/buffet/manager.h b/buffet/manager.h
index c0086ed..d7d71bf 100644
--- a/buffet/manager.h
+++ b/buffet/manager.h
@@ -50,6 +50,7 @@
   void RegisterAsync(
       const base::FilePath& config_path,
       const base::FilePath& state_path,
+      const base::FilePath& test_definitions_path,
       const chromeos::dbus_utils::AsyncEventSequencer::CompletionAction& cb);
 
  private: