--- a/documentation/ethercat_doc.tex	Wed Nov 05 11:51:07 2008 +0000
+++ b/documentation/ethercat_doc.tex	Wed Nov 05 13:20:21 2008 +0000
@@ -2604,6 +2604,13 @@
 Now, the \lstinline+ethercat+ tool can be used (see sec.~\ref{sec:tool}) even
 as a non-root user.
 
+If non-root users shall have writing access, the following udev rule can be
+used instead:
+
+\begin{lstlisting}
+KERNEL=="EtherCAT[0-9]*", MODE="0664", GROUP="users"
+\end{lstlisting}
+
 %------------------------------------------------------------------------------
 
 \begin{thebibliography}{99}