diff --git a/doc/main.tex b/doc/main.tex
index 9d0a33eff..22ddb5625 100644
--- a/doc/main.tex
+++ b/doc/main.tex
@@ -107,6 +107,7 @@
 
 \documentclass[openany]{book}
 \usepackage[paperwidth=5.51in, paperheight=8.81in, top=0.6205in, bottom=1.005in, right=0.505in, left=0.705in,]{geometry} % From the original manual. Do not change.
+\usepackage[utf8]{inputenc} % Now we can write UTF8 characters directly in the .tex files
 \usepackage[T1]{fontenc} % T1 accanthis specific?
 \usepackage{accanthis} % Main font.
 \usepackage{yfonts} % ygothic: For first paragraphs.