Changing the heading of the bibliography

Question

I want to change the heading before of the bibliography. In the example below there will be in the table of contents the name 'Literaturverzeichnis' for the bibliography, but before the bibliography itself the heading is Literatur. How can I change this to Literaturverzeichnis?

\documentclass[11pt]{article}
\usepackage{hyperref}
\usepackage[ngerman]{babel}
\usepackage[utf8x]{inputenc}
\usepackage{url} 


\begin{document}
\tableofcontents

\bibliographystyle{unsrtdin}
\bibliography{src/bib/Literaturverzeichnis} 
\addcontentsline{toc}{section}{Literaturverzeichnis}

\end{document}