diff --git a/sound/usb/line6/pod.c b/sound/usb/line6/pod.c
index ee4c9d220fdf76c82a8504a6a63330462ea64878..cd44cb5f1310c639f5772705d4660a0ec52425bc 100644
--- a/sound/usb/line6/pod.c
+++ b/sound/usb/line6/pod.c
@@ -110,7 +110,7 @@ enum {
 	POD_BUSY_MIDISEND
 };
 
-static struct snd_ratden pod_ratden = {
+static const struct snd_ratden pod_ratden = {
 	.num_min = 78125,
 	.num_max = 78125,
 	.num_step = 1,
diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c
index 27bf61c177c02e34315b1ae89c09d98422bc6f14..d37db32ecd3b736fe737a94ef25ddedeaa9a826d 100644
--- a/sound/usb/line6/podhd.c
+++ b/sound/usb/line6/podhd.c
@@ -42,7 +42,7 @@ struct usb_line6_podhd {
 
 #define line6_to_podhd(x)	container_of(x, struct usb_line6_podhd, line6)
 
-static struct snd_ratden podhd_ratden = {
+static const struct snd_ratden podhd_ratden = {
 	.num_min = 48000,
 	.num_max = 48000,
 	.num_step = 1,
diff --git a/sound/usb/line6/toneport.c b/sound/usb/line6/toneport.c
index d0a555dbe324f0e8049023e1327fec7a6b58b584..94dd5e7ab2e682d5babae66fa9cb47e50ad8dd81 100644
--- a/sound/usb/line6/toneport.c
+++ b/sound/usb/line6/toneport.c
@@ -63,7 +63,7 @@ static int toneport_send_cmd(struct usb_device *usbdev, int cmd1, int cmd2);
 
 #define TONEPORT_PCM_DELAY 1
 
-static struct snd_ratden toneport_ratden = {
+static const struct snd_ratden toneport_ratden = {
 	.num_min = 44100,
 	.num_max = 44100,
 	.num_step = 1,