# Overfull vbox with scrbook and setspacing

The following MWE gives me a lot of badbox warnings Overfull \vbox (1.39674pt too high) has occurred while \output is active [] with always the same value of 1.39674pt.
It seems to be related to the headline with the chapter title, which is displayed on every page but the first page of a chapter.

\documentclass[
draft,
]{scrbook}

\usepackage[onehalfspacing]{setspace}
\usepackage{blindtext}

\begin{document}
\chapter{Introduction}
\Blindtext
\chapter{Results}
\Blindtext \Blindtext
\section{Good results}
\Blindtext \Blindtext
\section{Mediocre results}
\Blindtext \Blindtext
\Blindtext \Blindtext
\chapter{Conclusion}
\Blindtext
\end{document}


How can I fix this and what is the recommended way to increase linespacing in the KOMA-script documentclasses?

-

\usepackage[onehalfspacing]{setspace}

To tell typearea (used by KOMA) that the linespace was changed.