diff --git a/en/intro.tex b/en/intro.tex
index 9eea01d..955169f 100644
--- a/en/intro.tex
+++ b/en/intro.tex
@@ -5,6 +5,8 @@
 
 \section{Notation}
 
+% Also note the use of Cisco icons
+
 \section{Structure of the thesis}
 
 %- motivation