diff --git a/Datatypes/Enum.php b/Datatypes/Enum.php
index dbd2efb83..3d9f68655 100644
--- a/Datatypes/Enum.php
+++ b/Datatypes/Enum.php
@@ -26,7 +26,7 @@ namespace phpOMS\Datatypes;
  * @link       http://orange-management.com
  * @since      1.0.0
  */
-abstract class Enum
+abstract class Enum implements \Countable
 {
 
     /**