diff --git a/user_guide_src/source/models/model/057.php b/user_guide_src/source/models/model/057.php
index 6b7ca3250109..8184fd352b9d 100644
--- a/user_guide_src/source/models/model/057.php
+++ b/user_guide_src/source/models/model/057.php
@@ -7,7 +7,7 @@
 class UserModel extends Model
 {
     // ...
-    protected $casts = [
+    protected array $casts = [
         'id'        => 'int',
         'birthdate' => '?datetime',
         'hobbies'   => 'json-array',