Index: sources/canbus/messageinterpreter.h
===================================================================
diff -u -r8f6f7c11390e3ed6d918f1717d8e8b7ae5b7e5c6 -rd3f916066c2d10c10fffa91fd8a7e5ac6dd86c7d
--- sources/canbus/messageinterpreter.h	(.../messageinterpreter.h)	(revision 8f6f7c11390e3ed6d918f1717d8e8b7ae5b7e5c6)
+++ sources/canbus/messageinterpreter.h	(.../messageinterpreter.h)	(revision d3f916066c2d10c10fffa91fd8a7e5ac6dd86c7d)
@@ -20,6 +20,10 @@
 #include "messageglobals.h"
 #include "mmodel.h"
 
+// forward declaration
+class tst_messaging;
+class tst_logging;
+
 namespace Can {
 
 /*!
@@ -33,6 +37,10 @@
 {
     Q_OBJECT
 
+    // friend
+    friend class ::tst_messaging;
+    friend class ::tst_logging;
+
     bool                      isType(const Message &vMessage, Gui::GuiActionType vType) const;
     bool           isPayloadLenValid(const Message &vMessage, Gui::GuiActionType vType) const;