diff --git a/rapport/presentation.tex b/rapport/presentation.tex
index 14ecdbe5215eec7ac490a9bba9971882b2f89215..fdb0be3c8170d258652ee97cea6d579406fb6bd0 100644
--- a/rapport/presentation.tex
+++ b/rapport/presentation.tex
@@ -6,7 +6,7 @@
 \usepackage[T1]{fontenc}
 \usepackage[utf8x]{inputenc}
 \usepackage{amsmath,amssymb}%for \mod, \bmod, ..
-\usepackage{amsthm,amsfonts,mathrsfs}
+\usepackage{amsthm,amsfonts,mathrsfs,bbold}
 \usepackage[full,small]{complexity}
 \usepackage{ stmaryrd }
 \usepackage{ marvosym }