diff --git a/src/opnsense/www/js/jquery.bootgrid.js b/src/opnsense/www/js/jquery.bootgrid.js
index 9dbd0472d..87d29c144 100644
--- a/src/opnsense/www/js/jquery.bootgrid.js
+++ b/src/opnsense/www/js/jquery.bootgrid.js
@@ -1239,7 +1239,7 @@ Grid.defaults = {
               return value ? moment(parseInt(value)*1000) : "";
            },
            to: function (value) {
-              if (!Object.is(value)) {
+              if (!moment.isMoment(value)) {
                  value = moment(parseInt(value)*1000);
               }
               return value ? value.format("lll") : "";