Index: uspace/lib/libc/include/ipc/ipc.h
===================================================================
--- uspace/lib/libc/include/ipc/ipc.h	(revision 161ae0907d38dedd94fb6a9eebb3140377d0d848)
+++ uspace/lib/libc/include/ipc/ipc.h	(revision 12bf33aabbb4c9c0de96d2a50f4601aff4642be2)
@@ -253,4 +253,6 @@
 extern int ipc_unregister_irq(int, int);
 extern int ipc_forward_fast(ipc_callid_t, int, int, ipcarg_t, ipcarg_t, int);
+extern int ipc_forward_slow(ipc_callid_t, int, int, ipcarg_t, ipcarg_t,
+    ipcarg_t, ipcarg_t, ipcarg_t, int);