diff --git a/documentation/Makefile b/documentation/Makefile
index dc05c80e..d3e4018c 100644
--- a/documentation/Makefile
+++ b/documentation/Makefile
@@ -55,6 +55,8 @@ pdf: $(EXT_FILES)
 	$(MAKE) -C images
 	$(MAKE) -C graphs
 	pdflatex $(LATEX_OPTIONS) $(FILE)
+# compile twice to update the table of contents
+	pdflatex $(LATEX_OPTIONS) $(FILE)
 
 index:
 	makeindex $(FILE)
diff --git a/documentation/ethercat_doc.tex b/documentation/ethercat_doc.tex
index fd0bc75a..381ff083 100644
--- a/documentation/ethercat_doc.tex
+++ b/documentation/ethercat_doc.tex
@@ -2903,7 +2903,7 @@ 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
@@ -2985,7 +2985,7 @@ in \autoref{sec:timing-bus}.
 
 %------------------------------------------------------------------------------
 
-\subsection{Bus Cycle Measuring}
+\section{Bus Cycle Measuring}
 \label{sec:timing-bus}
 \index{Bus cycle}