diff --git a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index ba64abf44..d74db40bb 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -174,7 +174,7 @@ class XmlDriver extends AbstractFileDriver
 
             if (isset($idElement->generator)) {
                 $metadata->setIdGeneratorType(constant('Doctrine\ORM\Mapping\ClassMetadata::GENERATOR_TYPE_'
-                        . (string)$idElement->generator['strategy']));
+                        . strtoupper((string)$idElement->generator['strategy'])));
             }
 
             // Check for SequenceGenerator/TableGenerator definition
diff --git a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml
index 1568ba917..e0af42faf 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml
+++ b/tests/Doctrine/Tests/ORM/Mapping/xml/Doctrine.Tests.ORM.Mapping.User.dcm.xml
@@ -13,7 +13,7 @@
         </lifecycle-callbacks>
 
         <id name="id" type="integer" column="id">
-            <generator strategy="AUTO"/>
+            <generator strategy="auto"/>
         </id>
         
         <field name="name" column="name" type="string" length="50"/>