diff --git a/sound/isa/ad1816a/ad1816a_lib.c b/sound/isa/ad1816a/ad1816a_lib.c
index 5c815f5fb044906f5e76cafe0c46e9107b2e0bd2..5c6df15043d081ee61ce16172d5640b8e062f51b 100644
--- a/sound/isa/ad1816a/ad1816a_lib.c
+++ b/sound/isa/ad1816a/ad1816a_lib.c
@@ -653,7 +653,7 @@ int snd_ad1816a_create(struct snd_card *card,
 	return 0;
 }
 
-static struct snd_pcm_ops snd_ad1816a_playback_ops = {
+static const struct snd_pcm_ops snd_ad1816a_playback_ops = {
 	.open =		snd_ad1816a_playback_open,
 	.close =	snd_ad1816a_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
@@ -664,7 +664,7 @@ static struct snd_pcm_ops snd_ad1816a_playback_ops = {
 	.pointer =	snd_ad1816a_playback_pointer,
 };
 
-static struct snd_pcm_ops snd_ad1816a_capture_ops = {
+static const struct snd_pcm_ops snd_ad1816a_capture_ops = {
 	.open =		snd_ad1816a_capture_open,
 	.close =	snd_ad1816a_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,