diff --git a/board/gdsys/a38x/hre.c b/board/gdsys/a38x/hre.c
index f303793..06856ea 100644
--- a/board/gdsys/a38x/hre.c
+++ b/board/gdsys/a38x/hre.c
@@ -166,7 +166,7 @@
 			return -1;
 		if (err)
 			continue;
-		sha1_csum(buf, buf_len, digest);
+		sha1_csum_wd(buf, buf_len, digest, SHA1_DEF_CHUNK_SZ);
 		if (!memcmp(digest, pubkey_digest, 20)) {
 			*handle = key_handles[i];
 			return 0;