diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index b4c855c25eef..703c118f9d4e 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1473,8 +1473,8 @@ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
 	if (!cval->cmask) {
 		snd_usb_set_cur_mix_value(cval, 0, 0, cval->max);
 	} else {
+		idx = 0;
 		for (i = 0; i < MAX_CHANNELS; i++) {
-			idx = 0;
 			if (cval->cmask & BIT(i)) {
 				snd_usb_set_cur_mix_value(cval, i + 1, idx, cval->max);
 				idx++;