diff --git a/lib/Doctrine.php b/lib/Doctrine.php
index bfa6a32d1..9e39c95d0 100644
--- a/lib/Doctrine.php
+++ b/lib/Doctrine.php
@@ -195,6 +195,7 @@ final class Doctrine
     const ATTR_DQL_PARSER_CACHE     = 150;
     const ATTR_DQL_CACHE            = 151;
     const ATTR_SQL_CACHE            = 152;
+    const ATTR_LOAD_REFERENCES      = 153;
 
     /**
      * LIMIT CONSTANTS