diff --git a/UPGRADE_TO_2_2 b/UPGRADE_TO_2_2
index 0500e4599..76372b221 100644
--- a/UPGRADE_TO_2_2
+++ b/UPGRADE_TO_2_2
@@ -1,3 +1,19 @@
 # Removed support for onUpdate in @JoinColumn
 
 The onUpdate foreign key handling makes absolutly no sense in an ORM. Additionally Oracle doesn't even support it. Support for it is removed.
+
+# Changes in Annotation Handling
+
+There have been some changes to the annotation handling in Common 2.2 again, that affect how people with old configurations
+from 2.0 have to configure the annotation driver if they don't use `Configuration::newDefaultAnnotationDriver()`:
+
+    // Register the ORM Annotations in the AnnotationRegistry
+    AnnotationRegistry::registerFile('path/to/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php');
+
+    $reader = new \Doctrine\Common\Annotations\SimpleAnnotationReader();
+    $reader->addNamespace('Doctrine\ORM\Mapping');
+    $reader = new \Doctrine\Common\Annotations\CachedReader($reader, new ArrayCache());
+
+    $driver = new AnnotationDriver($reader, (array)$paths);
+
+    $config->setMetadataDriverImpl($driver);
\ No newline at end of file