diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index 590baea3c4c3d9d3a2666025615b27f3c506545c..524f7450804f07cc506547618c17bdff96c925e6 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -176,7 +176,8 @@ static int wm9712_add_controls(struct snd_soc_codec *codec)
  * the codec only has a single control that is shared by both channels.
  * This makes it impossible to determine the audio path.
  */
-static int mixer_event (struct snd_soc_dapm_widget *w, int event)
+static int mixer_event(struct snd_soc_dapm_widget *w,
+	struct snd_kcontrol *k, int event)
 {
 	u16 l, r, beep, line, phone, mic, pcm, aux;