diff --git a/main.tex b/main.tex
index 55c366a9894dd63d70388c2a6ba934d5386cccbf..aa530120dd5f02346ddc854c3a77541351006012 100644
--- a/main.tex
+++ b/main.tex
@@ -3,6 +3,7 @@
 \usepackage[utf8x]{inputenc}
 \usepackage[english]{babel}
 \usepackage{bytefield}
+\usepackage{courier}
 
 \include{latexoptions}
 % For coloured tables.