urllib.parse.urlencode doc updarte.
Closes issue 15593
diff --git a/Doc/library/urllib.parse.rst b/Doc/library/urllib.parse.rst
index bc1da62..b6f241c 100644
--- a/Doc/library/urllib.parse.rst
+++ b/Doc/library/urllib.parse.rst
@@ -141,8 +141,9 @@
    percent-encoded sequences into Unicode characters, as accepted by the
    :meth:`bytes.decode` method.
 
-   Use the :func:`urllib.parse.urlencode` function to convert such
-   dictionaries into query strings.
+   Use the :func:`urllib.parse.urlencode` function (with the ``doseq``
+   parameter set to ``True``) to convert such dictionaries into query
+   strings.
 
 
    .. versionchanged:: 3.2