diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
index 8fce717ea79e..cd8a9987f7ac 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c
@@ -540,8 +540,7 @@ int sptlrpc_get_bulk_checksum(struct ptlrpc_bulk_desc *desc, __u8 alg,
 		memcpy(buf, hashbuf, buflen);
 	} else {
 		bufsize = buflen;
-		err = cfs_crypto_hash_final(hdesc, (unsigned char *)buf,
-					    &bufsize);
+		err = cfs_crypto_hash_final(hdesc, buf, &bufsize);
 	}
 
 	if (err)