diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index cebeb93..d2f224d 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -674,7 +674,7 @@
 	.read = ac97_read,
 	.write = ac97_write,
 	.set_bias_level = wm9712_set_bias_level,
-	.reg_cache_size = sizeof(wm9712_reg),
+	.reg_cache_size = ARRAY_SIZE(wm9712_reg),
 	.reg_word_size = sizeof(u16),
 	.reg_cache_step = 2,
 	.reg_cache_default = wm9712_reg,