Comment 25 for bug 1767361

I re-read William Desportes's comment #22 and the fix is in Debian's buster-backports repository.
It does not appear to be in Ubuntu's bionic-backports.

I'm not sure if this is right, but it may be simpler to apply the patch that's attached to this bug rather than trying to use a backport from a whole different, if related, distro.