Index: kernel/generic/include/ipc/sysipc.h
===================================================================
--- kernel/generic/include/ipc/sysipc.h	(revision 32099239a6124d59220f89570e99659141d22ed7)
+++ kernel/generic/include/ipc/sysipc.h	(revision b74959bd4f5b3c25215165e16f18a594cc56d741)
@@ -48,6 +48,6 @@
 unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data);
 unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval, 
-    unative_t arg1, unative_t arg2);
-unative_t sys_ipc_answer(unative_t callid, ipc_data_t *data);
+    unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4);
+unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data);
 unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec,
     int nonblocking);
Index: kernel/generic/include/syscall/syscall.h
===================================================================
--- kernel/generic/include/syscall/syscall.h	(revision 32099239a6124d59220f89570e99659141d22ed7)
+++ kernel/generic/include/syscall/syscall.h	(revision b74959bd4f5b3c25215165e16f18a594cc56d741)
@@ -53,5 +53,5 @@
 	SYS_IPC_CALL_ASYNC_SLOW,
 	SYS_IPC_ANSWER_FAST,
-	SYS_IPC_ANSWER,
+	SYS_IPC_ANSWER_SLOW,
 	SYS_IPC_FORWARD_FAST,
 	SYS_IPC_WAIT,