diff --git a/lib/Doctrine/ORM/Persisters/ElementCollectionPersister.php b/lib/Doctrine/ORM/Persisters/ElementCollectionPersister.php
index 67ae40081..688edeb46 100644
--- a/lib/Doctrine/ORM/Persisters/ElementCollectionPersister.php
+++ b/lib/Doctrine/ORM/Persisters/ElementCollectionPersister.php
@@ -27,7 +27,7 @@ namespace Doctrine\ORM\Persisters;
  * @author robo
  * @todo Implementation once support for collections of basic elements (i.e. strings) is added.
  */
-class ElementCollectionPersister extends AbstractCollectionPersister
+abstract class ElementCollectionPersister extends AbstractCollectionPersister
 {
     //put your code here
 }
\ No newline at end of file
diff --git a/lib/Doctrine/ORM/Persisters/UnionSubclassPersister.php b/lib/Doctrine/ORM/Persisters/UnionSubclassPersister.php
index 05ee49b7e..6afc51b4b 100644
--- a/lib/Doctrine/ORM/Persisters/UnionSubclassPersister.php
+++ b/lib/Doctrine/ORM/Persisters/UnionSubclassPersister.php
@@ -2,7 +2,7 @@
 
 namespace Doctrine\ORM\Persisters;
 
-class UnionSubclassPersister extends AbstractEntityPersister
+class UnionSubclassPersister extends StandardEntityPersister
 {
     
 }
\ No newline at end of file