diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 7a4c02548fb3..88b00c47b606 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -514,8 +514,6 @@ static const struct file_operations hung_up_tty_fops = {
 static DEFINE_SPINLOCK(redirect_lock);
 static struct file *redirect;
 
-extern void tty_sysctl_init(void);
-
 /**
  *	tty_wakeup	-	request more data
  *	@tty: terminal
diff --git a/include/linux/tty.h b/include/linux/tty.h
index a99e9b8e4e31..10212c6e4345 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -716,6 +716,7 @@ extern int __must_check tty_ldisc_init(struct tty_struct *tty);
 extern void tty_ldisc_deinit(struct tty_struct *tty);
 extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
 				 char *f, int count);
+extern void tty_sysctl_init(void);
 
 /* n_tty.c */
 extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);