diff --git a/cnam/thesis/thesis/introduction.tex b/cnam/thesis/thesis/introduction.tex
index 18d2c28..cb6a4dc 100644
--- a/cnam/thesis/thesis/introduction.tex
+++ b/cnam/thesis/thesis/introduction.tex
@@ -2,6 +2,10 @@
 \chapter*{\intro}
 \addcontentsline{toc}{chapter}{\intro}
 
+\ml
+{Purpose of this work, compared to existing ones in the same domain}
+{But du travail par rapport aux travaux déjà effectués sur le même sujet}
+
 \gls{os}
 
 \Glspl{exp}