diff --git a/doc/developer/advance.tex b/doc/developer/advance.tex
index 97355ab9c632c50b65f618e0d651789fb2b48056..5e72a00442cacf886c2ae4eb6ca8bcacacd3cbe1 100644
--- a/doc/developer/advance.tex
+++ b/doc/developer/advance.tex
@@ -949,7 +949,7 @@ Figure~\ref{fig:test-directives} shows all the directives that can be used in
 the configuration header of a test (or a test suite).
 \begin{figure}[ht]
 \begin{center}
-\begin{tabular}{|c|c|p{5cm}|l|}
+\begin{tabular}{|c|c|p{5cm}|p{6cm}|}
 \hline
 \textbf{Kind} & \textbf{Name} & \textbf{Specification} & \textbf{default}\\
 \hline