Thank you, Nilesh! Committed the fix and uploaded the package.
One more question: I didn't get the hang of gbp to build the package at first, so I put the orig.tar.xz below the working directory and used good old "dpkg-buildpackage -S", since I know dpkg-buildpackage is smart enough to ignore the .git directory. To be sure everything was ok, I did a debdiff between old and new *.dsc afterwards. If I have already tagged the package and pushed commit and tags, what are the potential bad effects of using plain "dpkg-buildpackage -S" in a project which is setup to use gbp? This is a question I always wanted to know but were afraid to ask... Thanks.