diff --git a/static/js/booking.js b/static/js/booking.js
index 1606bbc..dee079b 100755
--- a/static/js/booking.js
+++ b/static/js/booking.js
@@ -77,7 +77,7 @@ odoo.define('booking.main', function (require) {
         // var end_day=e[2]+'-'+e[1]+'-'+e[0]
         // var start_day=s[2]+'-'+s[1]+'-'+s[0]
         
-        var diff = Math.floor((Date.parse($("#end_day").val()) - Date.parse($("#start_day").val())) / 86400000)+1;
+        var diff = Math.floor((Date.parse($("#end_day").val()) - Date.parse($("#start_day").val())) / 86400000);
         console.log(diff)
         var start_date = Date.parse($("#start_day").val())
         var end_date = Date.parse($("#end_day").val())