diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 4d6db2cb1b71d9c0c2975a192a6729d3059c5f4b..aab3f6aa83fced96b9459dfa51ba309376fe29b3 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -1331,7 +1331,7 @@ always available.
 
    .. availability:: Unix.
 
-.. function:: set_int_max_str_digits(n)
+.. function:: set_int_max_str_digits(maxdigits)
 
    Set the :ref:`integer string conversion length limitation
    <int_max_str_digits>` used by this interpreter. See also