diff --git a/report.tex b/report.tex
index c961f7e..a2aa490 100644
--- a/report.tex
+++ b/report.tex
@@ -256,7 +256,7 @@
   \end{frame}
 
   \begin{frame}{Towards first order Z4c}{First order reduction}
-    \subsection{First order reduction: wave equation}
+    \subsection{First order reduction: wave equation as an example}
     We can introduce auxiliary variables to reduce a second order PDE system to a first order one. For example, for the wave equation on flat spacetime:
     \begin{equation}
       \Partial{t}^2 {\phi} - \tensor{\delta}{^i^j} \Partial{i} \Partial{j} \phi = 0,