diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index 38134c1f143..84c4ca098c6 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -181,7 +181,7 @@ Functions and classes provided:
    ``page.close()`` will be called when the :keyword:`with` block is exited.
 
 
-.. class:: aclosing(thing)
+.. function:: aclosing(thing)
 
    Return an async context manager that calls the ``aclose()`` method of *thing*
    upon completion of the block.  This is basically equivalent to::