diff --git a/phpBB/includes/template/twig/twig.php b/phpBB/includes/template/twig/twig.php
index 15e49df200..c894fb5567 100644
--- a/phpBB/includes/template/twig/twig.php
+++ b/phpBB/includes/template/twig/twig.php
@@ -126,7 +126,10 @@ class phpbb_template_twig implements phpbb_template
 		));
 
 		// Set enabled phpbb extensions
-		$this->twig->set_phpbb_extensions($this->extension_manager->all_enabled());
+		if ($this->extension_manager)
+		{
+			$this->twig->set_phpbb_extensions($this->extension_manager->all_enabled());
+		}
 
 		// Clear previous cache files (while WIP)
 		// @todo remove