diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 5194a2ac1ea8..1bdaa46d4fe1 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -2027,7 +2027,7 @@ static int snd_microii_spdif_switch_put(struct snd_kcontrol *kcontrol,
 	int err;
 
 	reg = ucontrol->value.integer.value[0] ? 0x28 : 0x2a;
-	if (reg != list->kctl->private_value)
+	if (reg == list->kctl->private_value)
 		return 0;
 
 	kcontrol->private_value = reg;