diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 95f29a2..5155ff2 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1489,7 +1489,7 @@
  * USB driver structure.
  */
 
-static struct usb_device_id acm_ids[] = {
+static const struct usb_device_id acm_ids[] = {
 	/* quirky and broken devices */
 	{ USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */
 	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */