diff --git a/indra/aistatemachine/aistatemachine.h b/indra/aistatemachine/aistatemachine.h
index 160c6d6eb..9b5b0aab6 100644
--- a/indra/aistatemachine/aistatemachine.h
+++ b/indra/aistatemachine/aistatemachine.h
@@ -146,12 +146,15 @@ class AIStateMachine : public LLThreadSafeRefCount
 	typedef AIAccessConst<multiplex_state_type>	multiplex_state_type_crat;
 	typedef AIAccess<multiplex_state_type>		multiplex_state_type_rat;
 	typedef AIAccess<multiplex_state_type>		multiplex_state_type_wat;
+
+  protected:
 	// Sub state.
 	AIThreadSafeSimpleDC<sub_state_type>	mSubState;
 	typedef AIAccessConst<sub_state_type>	sub_state_type_crat;
 	typedef AIAccess<sub_state_type>		sub_state_type_rat;
 	typedef AIAccess<sub_state_type>		sub_state_type_wat;
 
+  private:
 	// Mutex protecting everything below and making sure only one thread runs the state machine at a time.
 	LLMutex mMultiplexMutex;
 	// Mutex that is locked while calling *_impl() functions and the call back.