diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
index f5bd80858fc5..948c5203ca9c 100644
--- a/include/crypto/public_key.h
+++ b/include/crypto/public_key.h
@@ -39,9 +39,9 @@ extern void public_key_free(struct public_key *key);
 struct public_key_signature {
 	struct asymmetric_key_id *auth_ids[2];
 	u8 *s;			/* Signature */
-	u8 *digest;
 	u32 s_size;		/* Number of bytes in signature */
-	u32 digest_size;	/* Number of bytes in digest */
+	u8 *digest;
+	u8 digest_size;		/* Number of bytes in digest */
 	const char *pkey_algo;
 	const char *hash_algo;
 	const char *encoding;