diff --git a/core/AmB2BSession.h b/core/AmB2BSession.h
index 96d1b993..be0ad91d 100644
--- a/core/AmB2BSession.h
+++ b/core/AmB2BSession.h
@@ -178,12 +178,13 @@ class AmB2BCallerSession: public AmB2BSession
  private:
   // Callee Status
   CalleeStatus callee_status;
-  AmSipRequest invite_req;
 
   void relayEvent(AmEvent* ev);
   virtual void createCalleeSession();
   int  reinviteCaller(const AmSipReply& callee_reply);
 
+ protected:
+  AmSipRequest invite_req;
  public:
   AmB2BCallerSession();