The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
The following file is not distributable even in the non-free archive.
Please re-package the package without the file (if possible) or ask the FTP-masters to remove the package.
If the package has been uploaded to Debian before, please remember to also notify snapshot.debian.org about this package containing a non-distributable file.