diff --git a/documentation/ethercat_doc.tex b/documentation/ethercat_doc.tex
index 54d74406..faff6626 100644
--- a/documentation/ethercat_doc.tex
+++ b/documentation/ethercat_doc.tex
@@ -2971,7 +2971,7 @@ are rare, there are a few aspects that can (and should be) dealt with.
 
 %------------------------------------------------------------------------------
 
-\subsection{Application Interface Profiling}
+\section{Application Interface Profiling}
 \label{sec:timing-profile}
 \index{Profiling}
 % FIXME
@@ -3053,7 +3053,7 @@ in \autoref{sec:timing-bus}.
 
 %------------------------------------------------------------------------------
 
-\subsection{Bus Cycle Measuring}
+\section{Bus Cycle Measuring}
 \label{sec:timing-bus}
 \index{Bus cycle}