diff --git a/core/modules/comment/comment.field.inc b/core/modules/comment/comment.field.inc
index abef815..d5562ff 100644
--- a/core/modules/comment/comment.field.inc
+++ b/core/modules/comment/comment.field.inc
@@ -30,7 +30,8 @@ function comment_field_info() {
         'preview' => DRUPAL_OPTIONAL,
       ),
       'default_widget' => 'comment_default',
-      'default_formatter' => 'comment_default'
+      'default_formatter' => 'comment_default',
+      'field item class' => 'Drupal\comment\Type\CommentItem',
     )
   );
 }
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/Type/CommentItem.php b/core/modules/comment/lib/Drupal/comment/Plugin/Type/CommentItem.php
new file mode 100644
index 0000000..b73214c
--- /dev/null
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/Type/CommentItem.php
@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\comment\Type\CommentItem.
+ */
+
+namespace Drupal\comment\Type;
+
+use Drupal\Core\Entity\Field\FieldItemBase;
+
+/**
+ * Defines the 'test_field' entity field item.
+ */
+class CommentItem extends FieldItemBase {
+
+  /**
+   * Property definitions of the contained properties.
+   *
+   * @see CommentItem::getPropertyDefinitions()
+   *
+   * @var array
+   */
+  static $propertyDefinitions;
+
+  /**
+   * Implements \Drupal\Core\TypedData\ComplexDataInterface::getPropertyDefinitions().
+   */
+  public function getPropertyDefinitions() {
+
+    if (!isset(static::$propertyDefinitions)) {
+      static::$propertyDefinitions['status'] = array(
+        'type' => 'integer',
+        'label' => t('Comment status value'),
+      );
+    }
+    return static::$propertyDefinitions;
+  }
+
+}