diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index 8a4be4b73723..6afe83dad49f 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -536,13 +536,13 @@ static int mux_remove(struct parisc_device *dev)
  * This table only contains the parisc_device_id of known builtin mux
  * devices.  All other mux cards will be detected by the generic mux_tbl.
  */
-static struct parisc_device_id builtin_mux_tbl[] = {
+static const struct parisc_device_id builtin_mux_tbl[] = {
 	{ HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x15, 0x0000D }, /* All K-class */
 	{ HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x44, 0x0000D }, /* E35, E45, and E55 */
 	{ 0, }
 };
 
-static struct parisc_device_id mux_tbl[] = {
+static const struct parisc_device_id mux_tbl[] = {
 	{ HPHW_A_DIRECT, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0000D },
 	{ 0, }
 };