diff --git a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index 2ae7be78c..622a79a9e 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -842,6 +842,6 @@ class XmlDriver extends FileDriver
     {
         $flag = (string)$element;
 
-        return ($flag === true || $flag == "true" || $flag == "1");
+        return ($flag == "true" || $flag == "1");
     }
 }