diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index c2f037e2d..bed79caa3 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -3423,7 +3423,7 @@ class UnitOfWork implements PropertyChangedListener
                         $managedCol->setOwner($managedCopy, $assoc2);
                         $prop->setValue($managedCopy, $managedCol);
 
-                        $this->originalEntityData[spl_object_hash($entity)][$name] = $managedCol;
+//                        $this->originalEntityData[spl_object_hash($entity)][$name] = $managedCol;
                     }
 
                     if ($assoc2['isCascadeMerge']) {
diff --git a/tests/Doctrine/Tests/ORM/Functional/OidReuseTest.php b/tests/Doctrine/Tests/ORM/Functional/OidReuseTest.php
new file mode 100644
index 000000000..40aaf4238
--- /dev/null
+++ b/tests/Doctrine/Tests/ORM/Functional/OidReuseTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional;
+
+
+use Doctrine\Tests\Models\CMS\CmsUser;
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+class OidReuseTest extends OrmFunctionalTestCase
+{
+
+    private $userId;
+
+    /**
+     * {@inheritDoc}
+     */
+    protected function setUp()
+    {
+        $this->useModelSet('cms');
+        parent::setUp();
+    }
+
+    public function testOidReuse()
+    {
+        $user = new CmsUser();
+        $this->_em->merge($user);
+
+        $user = null;
+
+        $user = new CmsUser();
+        $this->_em->persist($user);
+    }
+
+}
\ No newline at end of file