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-rw-r--r--sphinx/util/parallel.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/sphinx/util/parallel.py b/sphinx/util/parallel.py
index 201e5b5e2..a37b85346 100644
--- a/sphinx/util/parallel.py
+++ b/sphinx/util/parallel.py
@@ -1,5 +1,7 @@
"""Parallel building utilities."""
+from __future__ import annotations
+
import os
import time
import traceback