diff --git a/pep-0492.txt b/pep-0492.txt
index c84c4f86a..fabe37446 100644
--- a/pep-0492.txt
+++ b/pep-0492.txt
@@ -69,7 +69,7 @@ API Design and Implementation Revisions
    supported: a ``RuntimeError`` will be raised if ``__aiter__``
    returns anything but an asynchronous iterator.
 
-   See [19]_ for more details.
+   See [19]_ and [20]_ for more details.
 
 
 Rationale and Goals
@@ -1074,7 +1074,7 @@ In 3.5.2 (as PEP 492 was accepted on a provisional basis) the
 directly.
 
 The motivation behind this change is to make it possible to
-implement asynchronous generators in Python.  See [19]_ for
+implement asynchronous generators in Python.  See [19]_ and [20]_ for
 more details.
 
 
@@ -1439,6 +1439,8 @@ References
 
 .. [19] http://bugs.python.org/issue27243
 
+.. [20] https://docs.python.org/3/reference/datamodel.html#async-iterators
+
 Acknowledgments
 ===============