diff --git a/tabellio/searchform/js_macros.pt b/tabellio/searchform/js_macros.pt
index 661f280..d60fca1 100644
--- a/tabellio/searchform/js_macros.pt
+++ b/tabellio/searchform/js_macros.pt
@@ -67,8 +67,18 @@ if(typeof(String.prototype.trim) === "undefined") {
                 'cacheLength': 0, 'matchContains': true, 'scroll': true, 'max': 30}).result(autocomplete_ready);
             $('.polgroup-autocomplete').each(sync_polgroups).autocomplete(PORTAL_URL+'/listPolgroups', {
             }).result(autocomplete_ready);
-            $('.topic-autocomplete').each(sync_topics).autocomplete(PORTAL_URL+'/listTopics', {
-                'cacheLength': 0, 'matchContains': true, 'scroll': true, 'max': 30}).result(autocomplete_ready);
+            $('.topic-autocomplete').each(sync_topics);
+            $('.topic-autocomplete').each(function(index, elem) {
+              $(elem).hide();
+              var add_topic = $('<a class="add-topic-link" href="#"' + '>Ajouter une matière<' + '/a>');
+              add_topic.prepOverlay({
+                      subtype: 'ajax',
+                      filter: '#content>*',
+                      urlmatch: '.*',
+                      urlreplace: '/thesaurus/plone-popup/'
+              });
+              $(add_topic).insertAfter(elem);
+            });
   });
 })(jQuery);
 </script>