diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 9b1ba33e6fe9..514398463f7d 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -1348,7 +1348,7 @@ static int snd_soc_lzo_cache_init(struct snd_soc_codec *codec)
 		ret = -ENOMEM;
 		goto err;
 	}
-	bitmap_zero(sync_bmp, reg_size);
+	bitmap_zero(sync_bmp, bmp_size);
 
 	/* allocate the lzo blocks and initialize them */
 	for (i = 0; i < blkcount; ++i) {