--- a/Doc/c-api/arg.rst	Sat May 05 09:44:08 2012 -0400
+++ b/Doc/c-api/arg.rst	Sat May 05 11:06:30 2012 -0700
@@ -317,6 +317,15 @@
    .. versionchanged:: 3.1
       ``Py_CLEANUP_SUPPORTED`` was added.
 
+``p`` (:class:`bool`) [int]
+   Tests the value passed in for truth (a boolean **p**\redicate) and converts
+   the result to its equivalent C true/false integer value.
+   Sets the int to 1 if the expression was true and 0 if it was false.
+   This accepts any valid Python value.  See :ref:`truth` for more
+   information about how Python tests values for truth.
+
+   .. versionchanged:: 3.3
+
 ``(items)`` (:class:`tuple`) [*matching-items*]
    The object must be a Python sequence whose length is the number of format units
    in *items*.  The C arguments must correspond to the individual format units in