diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index e2f0616e8..07cf68568 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -2386,6 +2386,8 @@ class UnitOfWork implements PropertyChangedListener
                 throw ORMInvalidArgumentException::invalidEntityName($entityName);
             }
 
+            $entityName = $this->em->getClassMetadata($entityName)->getName();
+
             $this->clearIdentityMapForEntityName($entityName);
             $this->clearEntityInsertionsForEntityName($entityName);
         }