diff --git a/communications-numeriques/main.tex b/communications-numeriques/main.tex
index 812c150..1660496 100644
--- a/communications-numeriques/main.tex
+++ b/communications-numeriques/main.tex
@@ -5,7 +5,6 @@
 \date{Dernière compilation~: \today{} à \currenttime}
 
 \usepackage{styles}
-\usepackage{xfrac}
 
 \pgfmathdeclarefunction{gauss}{2}{%
     \pgfmathparse{1/(#2*sqrt(2*pi))*exp(-((x-#1)^2)/(2*#2^2))}
diff --git a/communications-numeriques/styles.sty b/communications-numeriques/styles.sty
index f2094ac..30c893b 100644
--- a/communications-numeriques/styles.sty
+++ b/communications-numeriques/styles.sty
@@ -19,6 +19,7 @@
 \usepackage{amsfonts}
 \everymath{\displaystyle}
 \newcommand*\dif{\mathop{}\!\mathrm{d}}
+\usepackage{xfrac}
 \DeclareFontFamily{U}{wncy}{}
 \DeclareFontShape{U}{wncy}{m}{n}{<->wncyr10}{}
 \DeclareSymbolFont{mcy}{U}{wncy}{m}{n}