diff --git a/drivers/net/irda/irtty-sir.c b/drivers/net/irda/irtty-sir.c
index 6bcee01..d53aa95 100644
--- a/drivers/net/irda/irtty-sir.c
+++ b/drivers/net/irda/irtty-sir.c
@@ -191,7 +191,7 @@
 	tty = priv->tty;
 	if (!tty->ops->write)
 		return 0;
-	tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
+	set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 	writelen = tty_write_room(tty);
 	if (writelen > len)
 		writelen = len;
@@ -263,8 +263,7 @@
 	IRDA_ASSERT(priv != NULL, return;);
 	IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return;);
 
-	tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
-
+	clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 	if (priv->dev)
 		sirdev_write_complete(priv->dev);
 }
@@ -522,7 +521,7 @@
 
 	/* Stop tty */
 	irtty_stop_receiver(tty, TRUE);
-	tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
+	clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
 	if (tty->ops->stop)
 		tty->ops->stop(tty);