Checklist:

- [ ] Correct branch: master for new features; 3.3.x for fixes
- [ ] Tests pass
- [ ] Code follows coding guidelines: [master](https://area51.phpbb.com/docs/master/coding-guidelines.html) and [3.3.x](https://area51.phpbb.com/docs/dev/3.3.x/development/coding_guidelines.html)
- [ ] Commit follows commit message [format](https://area51.phpbb.com/docs/dev/3.3.x/development/git.html)

Tracker ticket (set the ticket ID to **your ticket ID**):

https://tracker.phpbb.com/browse/PHPBB3-12345
