diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 59aad4d5da5321ab2d6e7b6688c0fd0238b2210e..19b491d2964f313744513920803e1c327305d7f9 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -87,7 +87,7 @@ static void msg_submit(struct mbox_chan *chan)
 exit:
 	spin_unlock_irqrestore(&chan->lock, flags);
 
-	if (!err && chan->txdone_method == TXDONE_BY_POLL)
+	if (!err && (chan->txdone_method & TXDONE_BY_POLL))
 		poll_txdone((unsigned long)chan->mbox);
 }