micropython usocket.IPPROTO_SEC not available

Question

I tried using usocket.IPPROTO_SEC for micropython however it does not seem available. Is there anything else I should do to get access to usocket.IPPROTO_SEC?

Setup

I use this docker image.

Micropython version: 1.11

Description

The micropython docs say that usocket.IPPROTO_SEC is an available constant, however when I try to access it, it is not there.

The output below shows how I am trying to access it and what are the attributes available inside usocket.

MicroPython v1.11-10-g84f1067f7 on 2019-06-02; linux version
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>>> import usocket
>>> usocket.IPPROTO_SEC
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'IPPROTO_SEC'
>>> usocket.
__class__       __name__        AF_INET         AF_INET6
AF_UNIX         MSG_DONTROUTE   MSG_DONTWAIT    SOCK_DGRAM
SOCK_RAW        SOCK_STREAM     SOL_SOCKET      SO_BROADCAST
SO_ERROR        SO_KEEPALIVE    SO_LINGER       SO_REUSEADDR
getaddrinfo     inet_ntop       inet_pton       sockaddr
socket