diff --git a/src/borg/archive.py b/src/borg/archive.py
index c1d4d8091..94cd482ac 100644
--- a/src/borg/archive.py
+++ b/src/borg/archive.py
@@ -34,7 +34,6 @@ from .helpers import safe_encode, safe_decode, make_path_safe, remove_surrogates
 from .helpers import StableDict
 from .helpers import bin_to_hex
 from .helpers import safe_ns
-from .helpers import int_to_bigint, bigint_to_int
 from .helpers import ellipsis_truncate, ProgressIndicatorPercent, log_multi
 from .helpers import PathPrefixPattern, FnmatchPattern
 from .helpers import CompressionDecider1, CompressionDecider2, CompressionSpec