diff --git a/sys/dev/sound/pcm/mixer.c b/sys/dev/sound/pcm/mixer.c
--- a/sys/dev/sound/pcm/mixer.c
+++ b/sys/dev/sound/pcm/mixer.c
@@ -1431,7 +1431,7 @@
 {
 	struct snddev_info *d;
 	struct snd_mixer *m;
-	int nmix, i;
+	int i;
 
 	/*
 	 * If probing the device handling the ioctl, make sure it's a mixer
@@ -1442,7 +1442,6 @@
 
 	d = NULL;
 	m = NULL;
-	nmix = 0;
 
 	/*
 	 * There's a 1:1 relationship between mixers and PCM devices, so
@@ -1462,7 +1461,7 @@
 
 		if (d->mixer_dev != NULL && d->mixer_dev->si_drv1 != NULL &&
 		    ((mi->dev == -1 && d->mixer_dev == i_dev) ||
-		    mi->dev == nmix)) {
+		    mi->dev == i)) {
 			m = d->mixer_dev->si_drv1;
 			mtx_lock(m->lock);
 
@@ -1474,7 +1473,7 @@
 			 *   sure to unlock when existing.
 			 */
 			bzero((void *)mi, sizeof(*mi));
-			mi->dev = nmix;
+			mi->dev = i;
 			snprintf(mi->id, sizeof(mi->id), "mixer%d", i);
 			strlcpy(mi->name, m->name, sizeof(mi->name));
 			mi->modify_counter = m->modify_counter;
@@ -1538,8 +1537,7 @@
 			mi->legacy_device = i;
 			 */
 			mtx_unlock(m->lock);
-		} else
-			++nmix;
+		}
 
 		PCM_UNLOCK(d);