diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index f79cbed..a1398bb 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -86,9 +86,7 @@
  * @see http://php.net/manual/reserved.variables.server.php
  * @see http://php.net/manual/function.time.php
  */
-if (!defined('REQUEST_TIME')) {
-  define('REQUEST_TIME', (int) $_SERVER['REQUEST_TIME']);
-}
+define('REQUEST_TIME', (int) $_SERVER['REQUEST_TIME']);
 
 /**
  * Regular expression to match PHP function names.