diff --git a/index.php b/index.php
index 996272f6ff..a91065e8cb 100644
--- a/index.php
+++ b/index.php
@@ -77,8 +77,9 @@
 
 define("IN_ETOMITE_PARSER", "true"); // provides compatibility with etomite 0.6 and maybe later versions
 define("IN_PARSER_MODE", "true");
-define("IN_MANAGER_MODE", "false");
-
+if (!defined('IN_MANAGER_MODE')) {
+	define("IN_MANAGER_MODE", "false");
+}
 if (!defined('MODX_API_MODE')) {
     define('MODX_API_MODE', false);
 }