# Drawing double hline with longtabu

I'm trying to draw a double horizontal line with longtabu

\begin{longtabu}{|l |l |}
\hline
0 & 1\\
\hline \hline
1 & 0\\
\hline
\end{longtabu}


... however, all I get is a thick line.

When using tabu, everything works as expected.

How should I proceed so as to get a double horizontal line using longtabu?

Using the package hhline solved my problem.
\begin{longtabu}{|l|l|}