diff --git a/sound/soc/codecs/stac9766.c b/sound/soc/codecs/stac9766.c
index e34969cdc0e8d0db0a2e90b3839371b781e6f617..cc0566c22ec12ecfcf3f67d486b6330fea448f47 100644
--- a/sound/soc/codecs/stac9766.c
+++ b/sound/soc/codecs/stac9766.c
@@ -379,7 +379,7 @@ static struct snd_soc_codec_driver soc_codec_dev_stac9766 = {
 	.remove = stac9766_codec_remove,
 	.suspend = stac9766_codec_suspend,
 	.resume = stac9766_codec_resume,
-	.reg_cache_size = sizeof(stac9766_reg),
+	.reg_cache_size = ARRAY_SIZE(stac9766_reg),
 	.reg_word_size = sizeof(u16),
 	.reg_cache_step = 2,
 	.reg_cache_default = stac9766_reg,