diff --git a/app/templates/configuration.j2 b/app/templates/configuration.j2
index d011e091..e9ec4d46 100644
--- a/app/templates/configuration.j2
+++ b/app/templates/configuration.j2
@@ -86,10 +86,15 @@
 <script>
 
     function update_bonus_description() {
-        var query = "/ScoDoc/get_bonus_description/" + $("#configuration_form select")[0].value;
-        $.get(query, '', function (data) {
-            $("#bonus_description").html(data);
-        });
+        let bonus_name = $("#configuration_form select")[0].value;
+        if (bonus_name) {
+            let query = "/ScoDoc/get_bonus_description/" + bonus_name;
+            $.get(query, '', function (data) {
+                $("#bonus_description").html(data);
+            });
+        } else {
+            $("#bonus_description").html("pas de bonus défini");
+        }
     }
 
     $(function () {