Index: kernel/generic/include/ipc/ipc.h
===================================================================
--- kernel/generic/include/ipc/ipc.h	(revision 5a775507255e91a5b1fa95384f853e5beed2f792)
+++ kernel/generic/include/ipc/ipc.h	(revision f9841e692b7ead7f19c6caf92ef08eeb5f912775)
@@ -168,4 +168,5 @@
 extern int ipc_forward(call_t *, phone_t *, answerbox_t *, unsigned int);
 extern void ipc_answer(answerbox_t *, call_t *);
+extern void _ipc_answer_free_call(call_t *, bool);
 
 extern void ipc_phone_init(phone_t *);