Actually this is a bug in gtk-doc, see https://bugzilla.gnome.org/show_bug.cgi?id=783420 It should be fixed by gtk-doc upstream if I read that bugreport right, although it's workarounded by libfm upstream, see the latest commit b072ee0400432d72fdf86ba9fed74a7e0ec11ec1 in the libfm upstream GIT.
