tocbibind does not add an numbered entry to the toc [duplicate]

Question

Possible Duplicate:
Section added by \addcontentsline on the wrong page

I have a document in report class with

\documentclass[12pt,a4paper]{report}  
\linespread{1.5}  
\usepackage[T1]{fontenc}   
\usepackage[utf8]{inputenc}  
\usepackage[ngerman]{babel}    
\usepackage[natbib=true,style=numeric,doi=false,isbn=false,url=false,maxcitenames=2{biblatex}  
\bibliography{mybib}  
\usepackage[numbib]{tocbibind}  
\begin{document}    
\tableofcontents  
\chapter{test}  
\printbibliography  
\end{document} 

This does not add an entry for the bibliography. Changing \printbibliography to

\printbibliography[heading=bibintoc]

works, although I have no idea what it actually does. Still, the entry is not numbered, it looks like this

Table of Contents  
Table of Contents ................ 1  
1 test ........................... 2  
Literatur ........................ 3

My questions: What does heading=bibintoc and how can I have the bibliography numbered automatically?

Answer 1

Instead of using tocbibind, you can simply use the bibnumbered heading which will create a numbered heading which is also added to the table of contents:

\printbibliography[heading=bibnumbered]