diff --git a/phpBB/common.php b/phpBB/common.php
index bacaf2e7a7..5e1bfedf38 100644
--- a/phpBB/common.php
+++ b/phpBB/common.php
@@ -19,7 +19,7 @@ if (!defined('IN_PHPBB'))
 }
 
 // Init Framework
-require PHPBB_ROOT_PATH . 'includes/core/bootstrap.' . PHP_EXT;
+require_once PHPBB_ROOT_PATH . 'includes/core/bootstrap.' . PHP_EXT;
 
 // Run through remaining Framework states
 if (defined('PHPBB_CONFIG_MISSING') || !defined('PHPBB_INSTALLED'))