diff --git a/share/man/man9/make_dev.9 b/share/man/man9/make_dev.9
--- a/share/man/man9/make_dev.9
+++ b/share/man/man9/make_dev.9
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd January 19, 2025
+.Dd August 29, 2025
 .Dt MAKE_DEV 9
 .Os
 .Sh NAME
@@ -164,6 +164,15 @@
 .Fa si_cred
 member of the initialized
 .Fa struct cdev .
+The
+.Fa si_cred
+member will be exposed to the
+.Xr mac 9
+framework and used to limit visibility of the device in jailed views of
+.Xr devfs 4 .
+Note that jailed processes with access to the controlling terminal will be
+allowed to view the device corresponding to its controlling
+.Xr tty 4 .
 .Pp
 The
 .Va args.mda_flags
@@ -463,6 +472,7 @@
 .Sh SEE ALSO
 .Xr devctl 4 ,
 .Xr devfs 4 ,
+.Xr tty 4 ,
 .Xr dev_clone 9
 .Sh HISTORY
 The