diff --git a/demos/collection/tablefilter.php b/demos/collection/tablefilter.php
index 48d306377c..0ce61f067c 100644
--- a/demos/collection/tablefilter.php
+++ b/demos/collection/tablefilter.php
@@ -21,6 +21,11 @@
     'type' => 'boolean',
 ]);
 
+$model->addExpression('bigint', [
+    'expr' => $model->expr('['.$model->getIdField()->shortName.']'),
+    'type' => 'bigint',
+]);
+
 $grid->setModel($model);
 $grid->addFilterColumn();