Index: sources/canbus/messagebuilder.h
===================================================================
diff -u -r0e87420e50dd94c37eb25f289ef3262e0e45d7f4 -rd3f916066c2d10c10fffa91fd8a7e5ac6dd86c7d
--- sources/canbus/messagebuilder.h	(.../messagebuilder.h)	(revision 0e87420e50dd94c37eb25f289ef3262e0e45d7f4)
+++ sources/canbus/messagebuilder.h	(.../messagebuilder.h)	(revision d3f916066c2d10c10fffa91fd8a7e5ac6dd86c7d)
@@ -21,6 +21,9 @@
 #include "guiglobals.h"
 #include "messageglobals.h"
 
+// forward declaration
+class tst_messaging;
+
 namespace Can {
 
 /*!
@@ -49,6 +52,8 @@
 {
     Q_OBJECT
 
+    friend class ::tst_messaging;
+
     bool                _enableConsoleOut   = false;
 
     void                addSyncByte (      QByteArray &vPayload);