diff --git a/inc/filter.class.php b/inc/filter.class.php
index 63fbf0d..a01ffe3 100644
--- a/inc/filter.class.php
+++ b/inc/filter.class.php
@@ -97,7 +97,7 @@ function showForm($ID, $options = []) {
       echo Html::hidden('plugin_addressing_addressings_id', ['value' => $options['items_id']]);
       echo "<td>" . __('Name') . "</td>";
       echo "<td>";
-      echo Html::input('name', ['value' => $this->fields['name'], 'size' => 40]);
+      echo Html::input('name', ['value' => $this->fields['name'], 'size' => 40, 'required' => '']);
       echo "</td>";
       echo "</tr>";