diff --git a/index.html b/index.html
index 39abe31..5d1d63f 100644
--- a/index.html
+++ b/index.html
@@ -43,9 +43,15 @@ function afficherArbre()
   var heritage  = [ 'XXX' ];
   var m14_ul    = [ document.getElementById('smeti_list') ];
   var m14_span  = [ null ];
+  var ul = document.createElement('ul');
 
   while(m14_ul[0].firstChild) m14_ul[0].removeChild(m14_ul[0].firstChild);
 
+  // Ajouter la racine des UL
+  ul.setAttribute('class','ul_no_list');
+  m14_ul[m14_ul.length-1].appendChild(ul);
+  m14_ul.push(ul);
+
   liste_instructions.forEach(function(element){
     // if (element.instruction != 'M14')  return true;
     // if (element.type != courant)  return true;