diff --git a/modules/opencase_entities/src/Entity/OCCase.php b/modules/opencase_entities/src/Entity/OCCase.php
index fdcba41..9cbedf6 100644
--- a/modules/opencase_entities/src/Entity/OCCase.php
+++ b/modules/opencase_entities/src/Entity/OCCase.php
@@ -79,7 +79,7 @@ class OCCase extends RevisionableContentEntityBase implements OCCaseInterface {
    * id from the URL.
    */
   public static function defaultVal() {
-    return \Drupal::request()->query->get('actor_id');
+    return array(\Drupal::request()->query->get('actor_id'));
   }
 
   /**