\documentclass{scrartcl} \usepackage{libertinus-otf} %StartVisiblePreamble \usepackage{xindex} \makeindex %StopVisiblePreamble \makeatletter \let\ps@plain\ps@empty \makeatother \begin{document} \index{foo}foo and \writeidx{\item\protect\hrulefill} \index{bar}bar \index{gex}gex \printindex \end{document}