diff --git a/man2/ioctl_tty.2 b/man2/ioctl_tty.2
index c82690701..980b3517c 100644
--- a/man2/ioctl_tty.2
+++ b/man2/ioctl_tty.2
@@ -26,7 +26,7 @@ or
 .IR arg .
 .PP
 Use of
-.I ioctl
+.BR ioctl ()
 makes for nonportable programs.
 Use the POSIX interface described in
 .BR termios (3)