diff --git a/phpBB/includes/functions_acp.php b/phpBB/includes/functions_acp.php
index 4702f9939d..b65d6e6b5f 100644
--- a/phpBB/includes/functions_acp.php
+++ b/phpBB/includes/functions_acp.php
@@ -8,6 +8,14 @@
 *
 */
 
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
 /**
 * Header for acp pages
 */