diff --git a/preamble.tex b/preamble.tex
index c4ecd6a454132b87d712210be33566d3291dbb6b..102687f81dfeb2a0f35457f125605ff70ab31d36 100644
--- a/preamble.tex
+++ b/preamble.tex
@@ -122,7 +122,7 @@ bookmarks=true]%
 {8pt}
 {\Large\bfseries\filcenter}
 
-\titleformat{\subsection}{\needspace{12em}\center\large\bfseries}{}{1em}{}[\rule{.9\linewidth}{.2pt}]
+\titleformat{\subsection}{\needspace{13em}\center\large\bfseries}{}{1em}{}[\rule{.9\linewidth}{.2pt}]
 %
 \titleformat{\subsubsection}
 {\needspace{3em}\normalfont\normalsize\bfseries}{\thesubsubsection}{1em}{}