diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
index 553b0e9d8d17..c8f8024cb40e 100644
--- a/drivers/char/tty_port.c
+++ b/drivers/char/tty_port.c
@@ -90,7 +90,7 @@ void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty)
 	spin_lock_irqsave(&port->lock, flags);
 	if (port->tty)
 		tty_kref_put(port->tty);
-	port->tty = tty;
+	port->tty = tty_kref_get(tty);
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 EXPORT_SYMBOL(tty_port_tty_set);