diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index 7bf6c5a5c..a61630d1f 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -560,7 +560,15 @@ class UnitOfWork implements PropertyChangedListener
         foreach ($class->reflFields as $name => $refProp) {
             $value = $refProp->getValue($entity);
 
-            if ($class->isCollectionValuedAssociation($name) && $value !== null && ! ($value instanceof PersistentCollection)) {
+            if ($class->isCollectionValuedAssociation($name) && $value !== null) {
+                if ($value instanceof PersistentCollection) {
+                    if ($value->getOwner() === $entity) {
+                        continue;
+                    }
+
+                    $value = new ArrayCollection($value->getValues());
+                }
+
                 // If $value is not a Collection then use an ArrayCollection.
                 if ( ! $value instanceof Collection) {
                     $value = new ArrayCollection($value);
diff --git a/tests/Doctrine/Tests/Models/ECommerce/ECommerceProduct.php b/tests/Doctrine/Tests/Models/ECommerce/ECommerceProduct.php
index f053fd2cb..ba4f2a53d 100644
--- a/tests/Doctrine/Tests/Models/ECommerce/ECommerceProduct.php
+++ b/tests/Doctrine/Tests/Models/ECommerce/ECommerceProduct.php
@@ -137,6 +137,11 @@ class ECommerceProduct
         }
     }
 
+    public function setCategories($categories)
+    {
+        $this->categories = $categories;
+    }
+
     public function getCategories()
     {
         return $this->categories;
@@ -166,6 +171,9 @@ class ECommerceProduct
     public function __clone()
     {
         $this->isCloned = true;
+        if ($this->categories) {
+            $this->categories = clone $this->categories;
+        }
     }
 
     /**
diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2074Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2074Test.php
index 5538ee3d4..f53857ab3 100644
--- a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2074Test.php
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2074Test.php
@@ -12,6 +12,12 @@ use Doctrine\Tests\Models\ECommerce\ECommerceProduct;
  */
 class DDC2074Test extends \Doctrine\Tests\OrmFunctionalTestCase
 {
+    public function setUp()
+    {
+        $this->useModelSet('ecommerce');
+        parent::setUp();
+    }
+
     public function testShouldNotScheduleDeletionOnClonedInstances()
     {
         $class = $this->_em->getClassMetadata('Doctrine\Tests\Models\ECommerce\ECommerceProduct');
@@ -26,4 +32,30 @@ class DDC2074Test extends \Doctrine\Tests\OrmFunctionalTestCase
 
         $this->assertEquals(0, count($uow->getScheduledCollectionDeletions()));
     }
-}
\ No newline at end of file
+
+    public function testSavingClonedPersistentCollection()
+    {
+        $product = new ECommerceProduct();
+        $category = new ECommerceCategory();
+        $category->setName('foo');
+        $product->addCategory($category);
+
+        $this->_em->persist($product);
+        $this->_em->persist($category);
+        $this->_em->flush();
+
+        $newProduct = clone $product;
+
+        $this->_em->persist($newProduct);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $product1 = $this->_em->find('Doctrine\Tests\Models\ECommerce\ECommerceProduct', $product->getId());
+        $product2 = $this->_em->find('Doctrine\Tests\Models\ECommerce\ECommerceProduct', $newProduct->getId());
+
+        $this->assertCount(1, $product1->getCategories());
+        $this->assertCount(1, $product2->getCategories());
+
+        $this->assertSame($product1->getCategories()->get(0), $product2->getCategories()->get(0));
+    }
+}