diff --git a/man4/tty.4 b/man4/tty.4
index f9cbe9d1a..4536ded3c 100644
--- a/man4/tty.4
+++ b/man4/tty.4
@@ -71,7 +71,7 @@ while if the
 open fails, it is obviously not attached to a terminal and does not need
 to detach itself.
 .SH FILES
-/dev/tty
+.I /dev/tty
 .SH SEE ALSO
 .BR chown (1),
 .BR mknod (1),