diff --git a/sound/drivers/vx/vx_pcm.c b/sound/drivers/vx/vx_pcm.c
index ea7b377f0378..d318a33b6cfb 100644
--- a/sound/drivers/vx/vx_pcm.c
+++ b/sound/drivers/vx/vx_pcm.c
@@ -873,7 +873,7 @@ static int vx_pcm_prepare(struct snd_pcm_substream *subs)
 /*
  * operators for PCM playback
  */
-static struct snd_pcm_ops vx_pcm_playback_ops = {
+static const struct snd_pcm_ops vx_pcm_playback_ops = {
 	.open =		vx_pcm_playback_open,
 	.close =	vx_pcm_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
@@ -1095,7 +1095,7 @@ static snd_pcm_uframes_t vx_pcm_capture_pointer(struct snd_pcm_substream *subs)
 /*
  * operators for PCM capture
  */
-static struct snd_pcm_ops vx_pcm_capture_ops = {
+static const struct snd_pcm_ops vx_pcm_capture_ops = {
 	.open =		vx_pcm_capture_open,
 	.close =	vx_pcm_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,