--- a/src/lte/model/tta-ff-mac-scheduler.h	Thu Jun 01 16:57:22 2017 -0700
+++ b/src/lte/model/tta-ff-mac-scheduler.h	Fri Jun 02 14:45:29 2017 +0200
@@ -94,7 +94,9 @@
   virtual void SetLteFfrSapProvider (LteFfrSapProvider* s);
   virtual LteFfrSapUser* GetLteFfrSapUser ();
 
+  /// allow MemberCschedSapProvider<TtaFfMacScheduler> class friend access
   friend class MemberCschedSapProvider<TtaFfMacScheduler>;
+  /// allow MemberSchedSapProvider<TtaFfMacScheduler> class friend access
   friend class MemberSchedSapProvider<TtaFfMacScheduler>;
 
   /**