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-rw-r--r--sphinx/ext/autodoc.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/sphinx/ext/autodoc.py b/sphinx/ext/autodoc.py
index 1006d78b4..e210e7266 100644
--- a/sphinx/ext/autodoc.py
+++ b/sphinx/ext/autodoc.py
@@ -306,7 +306,9 @@ def format_annotation(annotation):
hasattr(annotation, '__args__') and \
hasattr(annotation, '__result__'):
args = annotation.__args__
- if args is Ellipsis:
+ if args is None:
+ return qualified_name
+ elif args is Ellipsis:
args_str = '...'
else:
formatted_args = (format_annotation(a) for a in args)