diff --git a/static/src/js/operation_chart.js b/static/src/js/operation_chart.js
index 158bf5b6d918a39bc5511f885e959bf929f38203..ee70055e775aa984d5c3122daaab19fc839721a7 100644
--- a/static/src/js/operation_chart.js
+++ b/static/src/js/operation_chart.js
@@ -74,8 +74,8 @@ odoo.define("oacc_portal_overview_cdc.operation_chart", function (require) {
 
             return this._super().then(function () {
                 // Récupération des dates de début et fin
-                var $btnWeekVal = $('button[name="month"]').val();
-                var objquote = $btnWeekVal.replaceAll("'", '"');
+                var $btnMonthVal = $('button[name="month"]').val();
+                var objquote = $btnMonthVal.replaceAll("'", '"');
                 const obj = JSON.parse(objquote);
                 self.first_day = obj.first_day;
                 self.last_day = obj.last_day;