diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst
index 7c7442b..54b52e4 100644
--- a/Doc/library/itertools.rst
+++ b/Doc/library/itertools.rst
@@ -235,7 +235,7 @@
 
       def islice(iterable, *args):
           s = slice(*args)
-          it = iter(range(s.start or 0, s.stop or sys.maxint, s.step or 1))
+          it = iter(range(s.start or 0, s.stop or sys.maxsize, s.step or 1))
           nexti = next(it)
           for i, element in enumerate(iterable):
               if i == nexti:
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 97f94aa..3fc86e4 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -365,11 +365,12 @@
    etc.)
 
 
-.. data:: maxint
+.. data:: maxsize
 
-   The largest positive integer supported by Python's regular integer type.  This
-   is at least 2\*\*31-1.  The largest negative integer is ``-maxint-1`` --- the
-   asymmetry results from the use of 2's complement binary arithmetic.
+   An integer giving the size of ``Py_ssize_t``. It's usually 2**31-1 on a 32
+   bit platform and 2**63-1 on a 64bit platform.
+
+   ..versionadded:: 3.0
 
 
 .. data:: maxunicode