[Tex/LaTex] Chapter title in header too long

Question

How can I format the header on every page displaying the title of the current chapter? In one of my chapters the title is too long so it is running out of the page.

Here's a minimal example of my document:

\documentclass[bibliography=totoc,version=first,listof=totoc,BCOR5mm,DIV12,index=totoc,numbers=noenddot]{scrbook}
\usepackage{bibgerm}
\usepackage[english,german]{babel}
\usepackage[utf8]{inputenc}
\usepackage{a4wide}
\usepackage{wrapfig}
\usepackage{caption}

\begin{document}
\frontmatter
\mainmatter
\chapter{Very long title}
\backmatter
\end{document}

Here's a screenshot of my problem:

Answer 1

Another alternative might be:

\chapter[medium-length title for TOC, if wanted]{full title name}
\chaptermark{short title for running headers}