diff --git a/sound/soc/codecs/wm8741.c b/sound/soc/codecs/wm8741.c
index a4b8c459ea57..546ea735f534 100644
--- a/sound/soc/codecs/wm8741.c
+++ b/sound/soc/codecs/wm8741.c
@@ -368,7 +368,7 @@ static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
 	return 0;
 }
 
-int wm8741_mute(struct snd_soc_dai *codec_dai, int mute)
+static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute)
 {
 	struct snd_soc_component *component = codec_dai->component;