enumitem-shortlabels: How to change the counter of items?

Question

I use the enumitem package with shortlabels.

\usepackage[shortlabels]{enumitem}

Now I've got

\begin{enumerate}[(L 1)]
     \item blablabla
     \item blablabla 
\end{enumerate}

and it goes like (L 1), (L 2) etc.

However I'd like it starts with 0. But the setcounter{item}{-1} doesn't work here. What to do?