diff --git a/gpl-lgpl.tex b/gpl-lgpl.tex
index 4e85d7e..36cc4b3 100644
--- a/gpl-lgpl.tex
+++ b/gpl-lgpl.tex
@@ -2475,7 +2475,7 @@ never be required to provide more than that.  One always has the right to
 modify a source code work by deleting any part of it, and there can be no
 requirement that free software source code be a whole functioning program.
 
-\section{The System Library Exception}
+\subsection{The System Library Exception}
 
 The previous section skipped over one part of the CCS definition, the
 so-called system library exception.  The ``System Libraries'' definition (and