diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index bf17459d..479f87d8 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -243,6 +243,12 @@
             <argument type="collection"/>
             <tag name="admin.element"/>
         </service>
+
+        <!-- Twig -->
+        <service id="FSi\Bundle\AdminSecurityBundle\Twig\SecurityExtension">
+            <tag name="twig.extension" />
+        </service>
+
     </services>
 
 </container>
diff --git a/Resources/views/Admin/datagrid.html.twig b/Resources/views/Admin/datagrid.html.twig
index a5c14a2f..2227a29e 100644
--- a/Resources/views/Admin/datagrid.html.twig
+++ b/Resources/views/Admin/datagrid.html.twig
@@ -4,7 +4,7 @@
 {# pattern: datagrid_{grid_name}_column_name_{column_name}_cell #}
 {% block datagrid_admin_security_user_column_name_batch_cell %}
     <td>
-    {% if attribute(app.user, 'getId') is not defined or cell.value == app.user.id %}
+    {% if are_same_users(cell.source, app.user) %}
         <input type="checkbox" disabled />
     {% else %}
         <input type="checkbox"
diff --git a/Twig/SecurityExtension.php b/Twig/SecurityExtension.php
new file mode 100644
index 00000000..38231231
--- /dev/null
+++ b/Twig/SecurityExtension.php
@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * (c) FSi sp. z o.o. <info@fsi.pl>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace FSi\Bundle\AdminSecurityBundle\Twig;
+
+use Symfony\Component\Security\Core\User\UserInterface;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+final class SecurityExtension extends AbstractExtension
+{
+    /**
+     * @return array<TwigFunction>
+     */
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction(
+                'are_same_users',
+                static function (UserInterface $a, UserInterface $b): bool {
+                    if (false === $a instanceof $b && false === $b instanceof $a) {
+                        return false;
+                    }
+
+                    return $a->getUsername() === $b->getUsername();
+                }
+            )
+        ];
+    }
+}