diff --git a/UPGRADE_TO_2_1 b/UPGRADE_TO_2_1
index 8b289ecd4..f42244493 100644
--- a/UPGRADE_TO_2_1
+++ b/UPGRADE_TO_2_1
@@ -9,6 +9,7 @@ The EntityRepository now has an interface Doctrine\Common\Persistence\ObjectRepo
 
 The annotation reader was heavily refactored between 2.0 and 2.1-RC1. In theory the operation of the new reader should be backwards compatible, but it has to be setup differently to work that way:
 
+    // new call to the AnnotationRegistry
     \Doctrine\Common\Annotations\AnnotationRegistry::registerFile('/doctrine-src/lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php');
 
     $reader = new \Doctrine\Common\Annotations\AnnotationReader();