diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index 3aefcc6c5..fb41899e0 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -658,7 +658,7 @@ class UnitOfWork implements PropertyChangedListener
 
         if ($changeSet) {
             if (isset($this->_entityChangeSets[$oid])) {
-                $this->_entityChangeSets[$oid] = $changeSet + $this->_entityChangeSets[$oid];
+                $this->_entityChangeSets[$oid] = array_merge($this->_entityChangeSets[$oid], $changeSet);
             }
             $this->_originalEntityData[$oid] = $actualData;
         }
diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC656Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC656Test.php
new file mode 100644
index 000000000..bd8ce5357
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC656Test.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use DateTime;
+
+require_once __DIR__ . '/../../../TestInit.php';
+
+class DDC656Test extends \Doctrine\Tests\OrmFunctionalTestCase
+{
+    protected function setUp()
+    {
+        parent::setUp();
+        try {
+            $this->_schemaTool->createSchema(array(
+                $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC656Entity')
+            ));
+        } catch(\Exception $e) {
+            
+        }
+    }
+
+    public function testRecomputeSingleEntityChangeSet_PreservesFieldOrder()
+    {
+        $entity = new DDC656Entity();
+        $entity->setName('test1');
+        $entity->setType('type1');
+        $this->_em->persist($entity);
+
+        $this->_em->getUnitOfWork()->computeChangeSet($this->_em->getClassMetadata(get_class($entity)), $entity);
+        $data1 = $this->_em->getUnitOfWork()->getEntityChangeset($entity);
+        $entity->setType('type2');
+        $this->_em->getUnitOfWork()->recomputeSingleEntityChangeSet($this->_em->getClassMetadata(get_class($entity)), $entity);
+        $data2 = $this->_em->getUnitOfWork()->getEntityChangeset($entity);
+
+        $this->assertEquals(array_keys($data1), array_keys($data2));
+
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $persistedEntity = $this->_em->find(get_class($entity), $entity->specificationId);
+        $this->assertEquals('type2', $persistedEntity->getType());
+        $this->assertEquals('test1', $persistedEntity->getName());
+    }
+}
+
+/**
+ * @Entity
+ */
+class DDC656Entity
+{
+    /**
+     * @Column(type="string")
+     */
+    public $name;
+
+    /**
+     * @Column(type="string")
+     */
+    public $type;
+
+    /**
+     * @Id @Column(type="integer") @GeneratedValue
+     */
+    public $specificationId;
+
+    public function getName() {
+        return $this->name;
+    }
+
+    public function setName($name) {
+        $this->name = $name;
+    }
+
+    public function getType() {
+        return $this->type;
+    }
+
+    public function setType($type) {
+        $this->type = $type;
+    }
+}
\ No newline at end of file