Index: uspace/lib/c/include/ipc/ipc.h
===================================================================
--- uspace/lib/c/include/ipc/ipc.h	(revision 55b56f4f973ad09f0bdbf190d1197e8c4ed8ef6a)
+++ uspace/lib/c/include/ipc/ipc.h	(revision a1026daf544b91d3c8e6d81817113aece3c7440e)
@@ -78,7 +78,7 @@
 	    (arg5))
 
-extern sysarg_t ipc_answer_fast(cap_handle_t, sysarg_t, sysarg_t, sysarg_t,
+extern int ipc_answer_fast(cap_handle_t, int, sysarg_t, sysarg_t,
     sysarg_t, sysarg_t);
-extern sysarg_t ipc_answer_slow(cap_handle_t, sysarg_t, sysarg_t, sysarg_t,
+extern int ipc_answer_slow(cap_handle_t, int, sysarg_t, sysarg_t,
     sysarg_t, sysarg_t, sysarg_t);