diff --git a/sound/pci/cs46xx/cs46xx_lib.c b/sound/pci/cs46xx/cs46xx_lib.c
index e4cf3187b4dd..00fa52e9a2f2 100644
--- a/sound/pci/cs46xx/cs46xx_lib.c
+++ b/sound/pci/cs46xx/cs46xx_lib.c
@@ -2371,7 +2371,7 @@ static int snd_cs46xx_front_dup_put(struct snd_kcontrol *kcontrol,
 				    ucontrol->value.integer.value[0] ? 0 : 0x200);
 }
 
-static struct snd_kcontrol_new snd_cs46xx_front_dup_ctl = {
+static const struct snd_kcontrol_new snd_cs46xx_front_dup_ctl = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Duplicate Front",
 	.info = snd_mixer_boolean_info,