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-rw-r--r--sphinx/extension.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/sphinx/extension.py b/sphinx/extension.py
index 4282d5f07..c6f1d044f 100644
--- a/sphinx/extension.py
+++ b/sphinx/extension.py
@@ -18,6 +18,7 @@ if False:
from typing import Any, Dict # NOQA
from sphinx.application import Sphinx # NOQA
from sphinx.config import Config # NOQA
+ from sphinx.util.typing import unicode # NOQA
logger = logging.getLogger(__name__)