diff --git a/crypto/serpent.c b/crypto/serpent.c
index 52ad1a4..e366406 100644
--- a/crypto/serpent.c
+++ b/crypto/serpent.c
@@ -481,6 +481,7 @@
 	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
 	.cra_blocksize		=	SERPENT_BLOCK_SIZE,
 	.cra_ctxsize		=	sizeof(struct serpent_ctx),
+	.cra_alignmask		=	3,
 	.cra_module		=	THIS_MODULE,
 	.cra_list		=	LIST_HEAD_INIT(serpent_alg.cra_list),
 	.cra_u			=	{ .cipher = {