--- a/accessible/base/NotificationController.h
+++ b/accessible/base/NotificationController.h
@@ -62,17 +62,17 @@ class TNotification : public Notificatio
 public:
   typedef void (Class::*Callback)(Args* ...);
 
   TNotification(Class* aInstance, Callback aCallback, Args* ... aArgs) :
     mInstance(aInstance), mCallback(aCallback), mArgs(aArgs...) { }
   virtual ~TNotification() { mInstance = nullptr; }
 
   virtual void Process() override
-    { ProcessHelper(typename IndexSequenceFor<Args...>::Type()); }
+    { ProcessHelper(std::index_sequence_for<Args...>); }
 
 private:
   TNotification(const TNotification&);
   TNotification& operator = (const TNotification&);
 
   template <size_t... Indices>
     void ProcessHelper(std::index_sequence<Indices...>)
   {