diff --git a/drivers/mailbox/mailbox-sti.c b/drivers/mailbox/mailbox-sti.c
index 4835817c53651dbfeeab4c4d7e6c86bf5f06aa58..2394cfe892b684c4f7d002f9c488a02f85daa54e 100644
--- a/drivers/mailbox/mailbox-sti.c
+++ b/drivers/mailbox/mailbox-sti.c
@@ -384,7 +384,7 @@ static struct mbox_chan *sti_mbox_xlate(struct mbox_controller *mbox,
 	return chan;
 }
 
-static struct mbox_chan_ops sti_mbox_ops = {
+static const struct mbox_chan_ops sti_mbox_ops = {
 	.startup	= sti_mbox_startup_chan,
 	.shutdown	= sti_mbox_shutdown_chan,
 	.send_data	= sti_mbox_send_data,