diff --git a/template_cours.cls b/template_cours.cls
index dc53464..6166bb6 100755
--- a/template_cours.cls
+++ b/template_cours.cls
@@ -451,6 +451,12 @@ breaklinks=true,
 %    #1
 %}
 
+% --- A duration indication
+% ---
+\newcommand\duration[1]{
+    \small{#1}
+}
+
 % --- Some default values
 % ---
 \date{\academicyear}