diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index 74c5afc1d93..826933fbf5e 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -423,12 +423,34 @@ public function commit($entity = null)
         $this->entityUpdates =
         $this->entityDeletions =
         $this->extraUpdates =
-        $this->entityChangeSets =
         $this->collectionUpdates =
         $this->collectionDeletions =
         $this->visitedCollections =
-        $this->scheduledForSynchronization =
         $this->orphanRemovals = array();
+
+        if ($entity === null) {
+            $this->entityChangeSets = $this->scheduledForSynchronization = array();
+        } elseif (is_object($entity)) {
+            $oid = spl_object_hash($entity);
+            $class = $this->em->getClassMetadata(get_class($entity));
+            if (isset($this->entityChangeSets[$oid])) {
+                unset($this->entityChangeSets[$oid]);
+            }
+            if (isset($this->scheduledForSynchronization[$class->rootEntityName][$oid])) {
+                unset($this->scheduledForSynchronization[$class->rootEntityName][$oid]);
+            }
+        } elseif (is_array($entity)) {
+            foreach ($entity as $object) {
+                $oid = spl_object_hash($object);
+                $class = $this->em->getClassMetadata(get_class($object));
+                if (isset($this->entityChangeSets[$oid])) {
+                    unset($this->entityChangeSets[$oid]);
+                }
+                if (isset($this->scheduledForSynchronization[$class->rootEntityName][$oid])) {
+                    unset($this->scheduledForSynchronization[$class->rootEntityName][$oid]);
+                }
+            }
+        }
     }
 
     /**