Comment 3 for bug 1750633

Here's the link to the upstream fix: https://github.com/paramiko/paramiko/pull/979/commits/fdc09c9f93fd189a6398d5b350a3c91011d9b4cb

I'd like to kindly request a backport (actually simply applying) it.
It's a fairly trivial and I just tested it on my server (18.04) without issues.