diff --git a/core/modules/menu_link_content/src/Entity/MenuLinkContent.php b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
index 3034ecf..420ebca 100644
--- a/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
+++ b/core/modules/menu_link_content/src/Entity/MenuLinkContent.php
@@ -261,6 +261,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
 
     $fields['description'] = BaseFieldDefinition::create('string')
       ->setLabel(t('Description'))
+      ->setDescription(t('Shown when hovering over the menu link.'))
       ->setTranslatable(TRUE)
       ->setSettings(array(
         'max_length' => 255,