Document O_ASYNC addition.

diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index b2d8f8085732de55a63d0c794b6141a29fd77810..6964183ca027857183759910a5823aa5ec029e3e 100644 (file)
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -717,7 +717,8 @@ platforms.  For descriptions of their availability and use, consult
    combined using the bitwise OR operator ``|``. Availability: Windows.
 
 
-.. data:: O_DIRECT
+.. data:: O_ASYNC
+          O_DIRECT
           O_DIRECTORY
           O_NOFOLLOW
           O_NOATIME