diff --git a/lib/libc/sys/jail.2 b/lib/libc/sys/jail.2
index 46be1f3e571..15ff2875587 100644
--- a/lib/libc/sys/jail.2
+++ b/lib/libc/sys/jail.2
@@ -83,7 +83,7 @@ The version number of the argument is not correct.
 .El
 .Pp
 Further
-.Fn Jail
+.Fn jail
 calls
 .Xr chroot 2
 internally, so the it can fail for all the same reasons.