Using mcode within a beamer frame

Question

I have a presentation that I would like to include some matlab code in. For that purpose I have included the mcode package, that basically configures the listings package. My problem is that the environment mode does not work inside a frame.

When I run the code below as it is (or with article documentclass) everything is as expected.

\documentclass{beamer}
\usepackage[framed,autolinebreaks,useliterate]{mcode}
\begin{document}
%\begin{frame} % code breaks if I include theese
\begin{lstlisting}
for i = 1:3 
   disp('cool'); % comment with some §\mcommentfont\LaTeX in it: $\mcommentfont\pi x^2$§
end 
\end{lstlisting}
%\end{frame} % code breaks if I include theese
\end{document}

If I uncomment the begin/end frame lines I get the following error:

Runaway argument?
! File ended while scanning use of \lst@next
! Emergency stop
!  ==> Fatal error occurred, no output PDF file produced!

The same happens if I use \frame{...} instead of \begin{frame}...\end{frame}.