diff --git a/Lib/functools.py b/Lib/functools.py
index b41dea7..4cde5f5 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -11,7 +11,8 @@
 
 __all__ = ['update_wrapper', 'wraps', 'WRAPPER_ASSIGNMENTS', 'WRAPPER_UPDATES',
            'total_ordering', 'cmp_to_key', 'lru_cache', 'reduce', 'partial',
-           'partialmethod', 'singledispatch', 'singledispatchmethod']
+           'partialmethod', 'singledispatch', 'singledispatchmethod',
+           "cached_property"]
 
 from abc import get_cache_token
 from collections import namedtuple