diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index 37ec468ab0e749199eae5509708bee45f732581c..9d8c7c8332348e2c3dcbbab44df1f0bb16918d67 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -2248,7 +2248,7 @@ static int rt5645_resume(struct snd_soc_codec *codec)
 #define RT5645_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S8)
 
-struct snd_soc_dai_ops rt5645_aif_dai_ops = {
+static struct snd_soc_dai_ops rt5645_aif_dai_ops = {
 	.hw_params = rt5645_hw_params,
 	.set_fmt = rt5645_set_dai_fmt,
 	.set_sysclk = rt5645_set_dai_sysclk,
@@ -2256,7 +2256,7 @@ struct snd_soc_dai_ops rt5645_aif_dai_ops = {
 	.set_pll = rt5645_set_dai_pll,
 };
 
-struct snd_soc_dai_driver rt5645_dai[] = {
+static struct snd_soc_dai_driver rt5645_dai[] = {
 	{
 		.name = "rt5645-aif1",
 		.id = RT5645_AIF1,
@@ -2459,7 +2459,7 @@ static int rt5645_i2c_remove(struct i2c_client *i2c)
 	return 0;
 }
 
-struct i2c_driver rt5645_i2c_driver = {
+static struct i2c_driver rt5645_i2c_driver = {
 	.driver = {
 		.name = "rt5645",
 		.owner = THIS_MODULE,