diff --git a/letsencrypt/cli.py b/letsencrypt/cli.py
index c6f90ea70..59030ff31 100644
--- a/letsencrypt/cli.py
+++ b/letsencrypt/cli.py
@@ -276,8 +276,7 @@ def run(args, config, plugins):  # pylint: disable=too-many-branches,too-many-lo
         lineage.save_successor(
             lineage.latest_common_version(), OpenSSL.crypto.dump_certificate(
                 OpenSSL.crypto.FILETYPE_PEM, new_certr.body),
-            new_key.pem, OpenSSL.crypto.dump_certificate(
-                OpenSSL.crypto.FILETYPE_PEM, new_chain))
+            new_key.pem, crypto_util.dump_pyopenssl_chain(new_chain))
 
         lineage.update_all_links_to(lineage.latest_common_version())
         # TODO: Check return value of save_successor