diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index 4cabb74d97e..ad16db53632 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c
@@ -365,7 +365,7 @@ static struct snd_soc_dai_link rx51_dai[] = {
 	},
 };
 
-struct snd_soc_aux_dev rx51_aux_dev[] = {
+static struct snd_soc_aux_dev rx51_aux_dev[] = {
 	{
 		.name = "TLV320AIC34b",
 		.codec_name = "tlv320aic3x-codec.2-0019",