diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index f2f763b4c399..e9a051a50ab2 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -5307,7 +5307,7 @@ static const struct rt5677_irq_desc rt5677_irq_descs[] = {
 	},
 };
 
-bool rt5677_check_hotword(struct rt5677_priv *rt5677)
+static bool rt5677_check_hotword(struct rt5677_priv *rt5677)
 {
 	int reg_gpio;