--- a/src/lte/model/lte-ue-mac.h	Thu Jun 01 16:57:22 2017 -0700
+++ b/src/lte/model/lte-ue-mac.h	Fri Jun 02 14:45:29 2017 +0200
@@ -42,8 +42,11 @@
 
 class LteUeMac :   public Object
 {
+  /// allow UeMemberLteUeCmacSapProvider class friend access
   friend class UeMemberLteUeCmacSapProvider;
+  /// allow UeMemberLteMacSapProvider class friend access
   friend class UeMemberLteMacSapProvider;
+  /// allow UeMemberLteUePhySapUser class friend access
   friend class UeMemberLteUePhySapUser;
 
 public: