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-rw-r--r--Doc/library/dataclasses.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index acfd13a712..072a500d9f 100644
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -308,7 +308,7 @@ Module-level decorators, classes, and functions
Raises :exc:`TypeError` if ``instance`` is not a dataclass instance.
-.. function:: astuple(*, tuple_factory=tuple)
+.. function:: astuple(instance, *, tuple_factory=tuple)
Converts the dataclass ``instance`` to a tuple (by using the
factory function ``tuple_factory``). Each dataclass is converted