diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index 5acf43ab104e..77880537a3cd 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -534,7 +534,7 @@ static int wm8731_init(struct snd_soc_device *socdev)
 	codec->set_bias_level = wm8731_set_bias_level;
 	codec->dai = &wm8731_dai;
 	codec->num_dai = 1;
-	codec->reg_cache_size = sizeof(wm8731_reg);
+	codec->reg_cache_size = ARRAY_SIZE(wm8731_reg);
 	codec->reg_cache = kmemdup(wm8731_reg, sizeof(wm8731_reg), GFP_KERNEL);
 	if (codec->reg_cache == NULL)
 		return -ENOMEM;
diff --git a/sound/soc/codecs/wm8750.c b/sound/soc/codecs/wm8750.c
index 1f11ad24551a..1ae670a98c5c 100644
--- a/sound/soc/codecs/wm8750.c
+++ b/sound/soc/codecs/wm8750.c
@@ -798,7 +798,7 @@ static int wm8750_init(struct snd_soc_device *socdev)
 	codec->set_bias_level = wm8750_set_bias_level;
 	codec->dai = &wm8750_dai;
 	codec->num_dai = 1;
-	codec->reg_cache_size = sizeof(wm8750_reg);
+	codec->reg_cache_size = ARRAY_SIZE(wm8750_reg);
 	codec->reg_cache = kmemdup(wm8750_reg, sizeof(wm8750_reg), GFP_KERNEL);
 	if (codec->reg_cache == NULL)
 		return -ENOMEM;
diff --git a/sound/soc/codecs/wm8753.c b/sound/soc/codecs/wm8753.c
index c32e6326be6c..285c5eaefe02 100644
--- a/sound/soc/codecs/wm8753.c
+++ b/sound/soc/codecs/wm8753.c
@@ -1557,7 +1557,7 @@ static int wm8753_init(struct snd_soc_device *socdev)
 	codec->set_bias_level = wm8753_set_bias_level;
 	codec->dai = wm8753_dai;
 	codec->num_dai = 2;
-	codec->reg_cache_size = sizeof(wm8753_reg);
+	codec->reg_cache_size = ARRAY_SIZE(wm8753_reg);
 	codec->reg_cache = kmemdup(wm8753_reg, sizeof(wm8753_reg), GFP_KERNEL);
 
 	if (codec->reg_cache == NULL)