diff --git a/phpBB/includes/template/twig/node/includeasset.php b/phpBB/includes/template/twig/node/includeasset.php
index 5abff10e3f..38c0498492 100644
--- a/phpBB/includes/template/twig/node/includeasset.php
+++ b/phpBB/includes/template/twig/node/includeasset.php
@@ -7,7 +7,7 @@
 *
 */
 
-class phpbb_template_twig_node_includeasset extends Twig_Node
+abstract class phpbb_template_twig_node_includeasset extends Twig_Node
 {
 	/** @var Twig_Environment */
 	protected $environment;