diff --git a/glossary/glossary.txt b/glossary/glossary.txt
index a58b0ae..8eb927c 100644
--- a/glossary/glossary.txt
+++ b/glossary/glossary.txt
@@ -122,3 +122,4 @@ customizations	éléments de personnalisation
 @pxref{Customization}	@pxref{Personnalisation}
 @pxref{Examining}	@pxref{Examiner}
 @xref{Lisp Libraries}	@xref{Librairies Lisp}
+@xref{Mail Headers}	@xref{En-têtes de courriel}