diff --git a/lib/libc/sys/cpuset.2 b/lib/libc/sys/cpuset.2
index 5a1d6955c984..3e76de39ca32 100644
--- a/lib/libc/sys/cpuset.2
+++ b/lib/libc/sys/cpuset.2
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 8, 2010
+.Dd February 14, 2014
 .Dt CPUSET 2
 .Os
 .Sh NAME
@@ -98,6 +98,7 @@ argument may have the following values:
 .Bl -column CPU_WHICH_CPUSET -offset indent
 .It Dv CPU_WHICH_TID Ta "id is lwpid_t (thread id)"
 .It Dv CPU_WHICH_PID Ta "id is pid_t (process id)"
+.It Dv CPU_WHICH_JAIL Ta "id is jid (jail id)"
 .It Dv CPU_WHICH_CPUSET Ta "id is a cpusetid_t (cpuset id)"
 .It Dv CPU_WHICH_IRQ Ta "id is an irq number"
 .El