Index: sources/model/mtemperaturesensors.h
===================================================================
diff -u -reece7acacf84e8cc34b830f6b5ab3f112823a905 -r7d3062c841b788ced31d939dec990afe0de1442d
--- sources/model/mtemperaturesensors.h	(.../mtemperaturesensors.h)	(revision eece7acacf84e8cc34b830f6b5ab3f112823a905)
+++ sources/model/mtemperaturesensors.h	(.../mtemperaturesensors.h)	(revision 7d3062c841b788ced31d939dec990afe0de1442d)
@@ -19,9 +19,16 @@
 // Project
 #include "types.h"
 
+// forward declarations
+class tst_models;
+
 namespace Model {
 
 class MTemperatureSensors {
+
+    // friends
+    friend class ::tst_models;
+
 public:
     QString  stringPrefix = "Temperature Sensors";
     struct Data {