diff --git a/terrible-bsp/terrible-bsp.tex b/terrible-bsp/terrible-bsp.tex
index c4cd06a..aeb657e 100644
--- a/terrible-bsp/terrible-bsp.tex
+++ b/terrible-bsp/terrible-bsp.tex
@@ -786,6 +786,8 @@ \section{Concluding remarks}
 \end{center}
 \end{frame}
 
+\appendix
+
 \section{Extra Slides}
 
 \begin{frame}[fragile]{Using an old gcc --- an example}