Index: Doc/library/os.rst
===================================================================
--- Doc/library/os.rst	(revision 63368)
+++ Doc/library/os.rst	(working copy)
@@ -613,7 +613,8 @@
    combined using the bitwise OR operator ``|``. Availability: Windows.
 
 
-.. data:: O_DIRECT
+.. data:: O_ASYNC
+          O_DIRECT
           O_DIRECTORY
           O_NOFOLLOW
           O_NOATIME