diff --git a/manual/manual.pdf b/manual/manual.pdf
index b75fff6..99bdd02 100644
Binary files a/manual/manual.pdf and b/manual/manual.pdf differ
diff --git a/manual/manual.tex b/manual/manual.tex
index fff1e30..e5e6db8 100644
--- a/manual/manual.tex
+++ b/manual/manual.tex
@@ -239,7 +239,7 @@ syntax for a simulation that uses 5 nodes:
 \end{itemize}
 
 
-\section{The interfaces section}
+\subsection{The interfaces section}
 The interfaces section allows to define the network interfaces that will be usable by each node
 during the simulation. For each interface the Table \ref{keywords:interfaces} references the
 available keywords.