diff --git a/libs/main/state_machine/pistatemachine_state.h b/libs/main/state_machine/pistatemachine_state.h
index 1d22fd43..5afbe224 100644
--- a/libs/main/state_machine/pistatemachine_state.h
+++ b/libs/main/state_machine/pistatemachine_state.h
@@ -38,6 +38,7 @@
 class PIP_EXPORT PIStateBase {
 	friend class PIStateMachine;
 	friend class PITransitionBase;
+	friend class PIStateFinal;
 
 public:
 	PIStateBase(const PIString & n = {}): name_(n) { ; }
@@ -76,7 +77,7 @@ public:
 
 	PIVector<PIStateBase *> gatherStates();
 
-protected:
+private:
 	bool start(bool force = false);
 	void setActive(bool yes);
 	void setActiveRecursive(bool yes);