Index: sources/canbus/messagedispatcher.h
===================================================================
diff -u -r939d1bae9a394697d46ca913a2dc3442bf8ef82f -r805119c460b4a266d6401c8705f4427e7fbe270f
--- sources/canbus/messagedispatcher.h	(.../messagedispatcher.h)	(revision 939d1bae9a394697d46ca913a2dc3442bf8ef82f)
+++ sources/canbus/messagedispatcher.h	(.../messagedispatcher.h)	(revision 805119c460b4a266d6401c8705f4427e7fbe270f)
@@ -26,6 +26,7 @@
 
 // forward declarations
 class tst_canbus;
+class tst_acknow;
 
 // since this class is the interface between GUI and Can
 // it needs to use Gui namespace otherwise it makes code hard to read.
@@ -85,18 +86,21 @@
 
     // friends
     friend class ::tst_canbus;
+    friend class ::tst_acknow;
 
     QHash<Can_Id, MessageList> _messageList;
 
-    Sequence            _txSequence = 0;
-    Sequence            _rxSequence = 0;
+    Sequence             _txSequence = 0;
+    Sequence             _rxSequence = 0;
 
-    MessageBuilder      _builder;
-    MessageInterpreter  _interpreter;
+    MessageBuilder       _builder;
+    MessageInterpreter   _interpreter;
 
-    QThread            *_thread = nullptr;
-    bool                _init   = false;
+    QThread             *_thread = nullptr;
+    bool                 _init   = false;
 
+    QList<GuiActionType> _needsAcknow {}; // no action needs Acknow for now
+
 // Singleton
 SINGLETON(MessageDispatcher)