diff --git a/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php
index 5953ca86a2..8e89dd5096 100644
--- a/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php
@@ -328,7 +328,7 @@ abstract class AbstractNormalizer extends SerializerAwareNormalizer implements N
                     $params[] = $data[$key];
                     // don't run set for a parameter passed to the constructor
                     unset($data[$key]);
-                } elseif ($constructorParameter->isOptional()) {
+                } elseif ($constructorParameter->isDefaultValueAvailable()) {
                     $params[] = $constructorParameter->getDefaultValue();
                 } else {
                     throw new RuntimeException(
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
index 23cb497ead..e8156dd10f 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
@@ -213,6 +213,15 @@ class GetSetMethodNormalizerTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(array(1, 2, 3), $obj->getBaz());
     }
 
+    public function testConstructorDenormalizeWithOptionalDefaultArgument()
+    {
+        $obj = $this->normalizer->denormalize(
+            array('bar' => 'test'),
+            __NAMESPACE__.'\GetConstructorArgsWithDefaultValueDummy', 'any');
+        $this->assertEquals(array(), $obj->getFoo());
+        $this->assertEquals('test', $obj->getBar());
+    }
+
     public function testConstructorWithObjectDenormalize()
     {
         $data = new \stdClass();
@@ -660,6 +669,33 @@ class GetConstructorOptionalArgsDummy
     }
 }
 
+class GetConstructorArgsWithDefaultValueDummy
+{
+    protected $foo;
+    protected $bar;
+
+    public function __construct($foo = array(), $bar)
+    {
+        $this->foo = $foo;
+        $this->bar = $bar;
+    }
+
+    public function getFoo()
+    {
+        return $this->foo;
+    }
+
+    public function getBar()
+    {
+        return $this->bar;
+    }
+
+    public function otherMethod()
+    {
+        throw new \RuntimeException('Dummy::otherMethod() should not be called');
+    }
+}
+
 class GetCamelizedDummy
 {
     private $kevinDunglas;
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
index 6a41930eb0..14a268f5bc 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
@@ -157,6 +157,15 @@ class ObjectNormalizerTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(array(1, 2, 3), $obj->getBaz());
     }
 
+    public function testConstructorDenormalizeWithOptionalDefaultArgument()
+    {
+        $obj = $this->normalizer->denormalize(
+            array('bar' => 'test'),
+            __NAMESPACE__.'\ObjectConstructorArgsWithDefaultValueDummy', 'any');
+        $this->assertEquals(array(), $obj->getFoo());
+        $this->assertEquals('test', $obj->getBar());
+    }
+
     public function testConstructorWithObjectDenormalize()
     {
         $data = new \stdClass();
@@ -566,3 +575,30 @@ class ObjectConstructorOptionalArgsDummy
         throw new \RuntimeException('Dummy::otherMethod() should not be called');
     }
 }
+
+class ObjectConstructorArgsWithDefaultValueDummy
+{
+    protected $foo;
+    protected $bar;
+
+    public function __construct($foo = array(), $bar)
+    {
+        $this->foo = $foo;
+        $this->bar = $bar;
+    }
+
+    public function getFoo()
+    {
+        return $this->foo;
+    }
+
+    public function getBar()
+    {
+        return $this->bar;
+    }
+
+    public function otherMethod()
+    {
+        throw new \RuntimeException('Dummy::otherMethod() should not be called');
+    }
+}