--- conf/files.bak	2008-01-31 16:08:01.000000000 -0800
+++ conf/files	2008-02-02 11:22:26.000000000 -0800
@@ -1526,7 +1526,7 @@
 kern/sys_pipe.c			standard
 kern/sys_process.c		standard
 kern/sys_socket.c		standard
-kern/syscalls.c			optional witness | invariants
+kern/syscalls.c			optional witness | invariants | kdtrace_hooks
 kern/sysv_ipc.c			standard
 kern/sysv_msg.c			optional sysvmsg
 kern/sysv_sem.c			optional sysvsem