diff --git a/lemarche/static/js/multiselect.js b/lemarche/static/js/multiselect.js
index 69b97cb3a..dec7d50e8 100644
--- a/lemarche/static/js/multiselect.js
+++ b/lemarche/static/js/multiselect.js
@@ -27,7 +27,7 @@ document.addEventListener('alpine:init', () => {
         options: [],
         filteredGroups: [],
         filteredOptions: [],
-        name: id,
+        name: id.replace(/^id_/, ''),
 
         initOptions(groupsJson, optionsJson) {
             if (groupsJson) {