diff --git a/core/modules/comment/src/CommentStatistics.php b/core/modules/comment/src/CommentStatistics.php
index c275f42..6b74184 100644
--- a/core/modules/comment/src/CommentStatistics.php
+++ b/core/modules/comment/src/CommentStatistics.php
@@ -68,7 +68,7 @@ public function __construct(Connection $database, AccountInterface $current_user
   /**
    * {@inheritdoc}
    */
-  public function read($entities, $entity_type, $accurate = TRUE) {
+  public function read(array $entities, $entity_type, $accurate = TRUE) {
     $options = $accurate ? array() : array('target' => 'replica');
     $stats =  $this->database->select('comment_entity_statistics', 'ces', $options)
       ->fields('ces')
@@ -96,7 +96,7 @@ public function delete(EntityInterface $entity) {
   /**
    * {@inheritdoc}
    */
-  public function create(FieldableEntityInterface $entity, $fields) {
+  public function create(FieldableEntityInterface $entity, array $fields) {
     $query = $this->database->insert('comment_entity_statistics')
       ->fields(array(
         'entity_id',