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-rw-r--r--sphinx/util/math.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/sphinx/util/math.py b/sphinx/util/math.py
index 58f8a17d0..3c15b26b1 100644
--- a/sphinx/util/math.py
+++ b/sphinx/util/math.py
@@ -14,6 +14,7 @@ if False:
# For type annotation
from docutils import nodes # NOQA
from sphinx.builders.html import HTMLTranslator # NOQA
+ from sphinx.util.typing import unicode # NOQA
def get_node_equation_number(writer, node):