diff --git a/pep-0492.txt b/pep-0492.txt
index 7b9d4b7bd..9890d40c3 100644
--- a/pep-0492.txt
+++ b/pep-0492.txt
@@ -684,12 +684,12 @@ New Standard Library Functions
 * ``inspect.isawaitable(obj)`` returns ``True`` if ``obj`` can be used
   in ``await`` expression.  See `Await Expression`_ for details.
 
-* ``sys.set_coroutine_wrapper(wrapper)`` allows to intercept creation
-  of *coroutine* objects.  ``wrapper`` must be a callable that accepts
-  one argument: a *coroutine* object or ``None``.  ``None`` resets the
-  wrapper.  If called twice, the new wrapper replaces the previous one.
-  The function is thread-specific.  See `Debugging Features`_ for more
-  details.
+* ``sys.set_coroutine_wrapper(wrapper)`` allows to intercept creation of
+  *coroutine* objects.  ``wrapper`` must be either a callable that
+  accepts one argument (a *coroutine* object), or ``None``.  ``None``
+  resets the wrapper.  If called twice, the new wrapper replaces the
+  previous one. The function is thread-specific.  See `Debugging
+  Features`_ for more details.
 
 * ``sys.get_coroutine_wrapper()`` returns the current wrapper object.
   Returns ``None`` if no wrapper was set.  The function is