diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 6dbaeee..facf859 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -272,7 +272,7 @@
                           struct scatterlist *in, unsigned int length,
                           int write, sector_t sector)
 {
-	u8 iv[cc->iv_size];
+	u8 iv[cc->iv_size] __attribute__ ((aligned(__alignof__(u64))));
 	struct blkcipher_desc desc = {
 		.tfm = cc->tfm,
 		.info = iv,