diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index c1a6d3c..b401383 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -281,7 +281,7 @@
 static int moxa_set_serial_info(struct moxa_str *, struct serial_struct __user *);
 static void MoxaSetFifo(int port, int enable);
 
-static struct tty_operations moxa_ops = {
+static const struct tty_operations moxa_ops = {
 	.open = moxa_open,
 	.close = moxa_close,
 	.write = moxa_write,