diff --git a/src/Symfony/Component/Serializer/Encoder/AbstractEncoder.php b/src/Symfony/Component/Serializer/Encoder/AbstractEncoder.php
index eb7245d..a2e9035 100644
--- a/src/Symfony/Component/Serializer/Encoder/AbstractEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/AbstractEncoder.php
@@ -3,6 +3,7 @@
 namespace Symfony\Component\Serializer\Encoder;

 use Symfony\Component\Serializer\SerializerInterface;
+use Symfony\Component\Serializer\SerializerAwareInterface;

 /*
  * This file is part of the Symfony framework.
@@ -18,7 +19,7 @@ use Symfony\Component\Serializer\SerializerInterface;
  *
  * @author Jordi Boggiano <j.boggiano@seld.be>
  */
-abstract class AbstractEncoder implements EncoderInterface
+abstract class AbstractEncoder implements SerializerAwareInterface, EncoderInterface
 {
     protected $serializer;

@@ -37,4 +38,4 @@ abstract class AbstractEncoder implements EncoderInterface
     {
         return $this->serializer;
     }
-}
\ No newline at end of file
+}
diff --git a/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php b/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php
new file mode 100644
index 0000000..ab49c69
--- /dev/null
+++ b/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Symfony\Component\Serializer\Encoder;
+
+use Symfony\Component\Serializer\SerializerInterface;
+
+/*
+ * This file is part of the Symfony framework.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+/**
+ * Defines the interface of encoders
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+interface DecoderInterface
+{
+    /**
+     * Decodes a string into PHP data
+     *
+     * @param string $data data to decode
+     * @param string $format format to decode from
+     * @return mixed
+     * @api
+     */
+    function decode($data, $format);
+}
diff --git a/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php b/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
index b7401e0..e204440 100644
--- a/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
+++ b/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
@@ -29,30 +29,4 @@ interface EncoderInterface
      * @api
      */
     function encode($data, $format);
-
-    /**
-     * Decodes a string into PHP data
-     *
-     * @param string $data data to decode
-     * @param string $format format to decode from
-     * @return mixed
-     * @api
-     */
-    function decode($data, $format);
-
-    /**
-     * Sets the owning Serializer object
-     *
-     * @param SerializerInterface $serializer
-     * @api
-     */
-    function setSerializer(SerializerInterface $serializer);
-
-    /**
-     * Gets the owning Serializer object
-     *
-     * @return SerializerInterface
-     * @api
-     */
-    function getSerializer();
 }
diff --git a/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php b/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php
index 31e4b00..5ab6876 100644
--- a/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php
@@ -18,7 +18,7 @@ use Symfony\Component\Serializer\SerializerInterface;
  *
  * @author Jordi Boggiano <j.boggiano@seld.be>
  */
-class JsonEncoder extends AbstractEncoder
+class JsonEncoder extends AbstractEncoder implements DecoderInterface
 {
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php b/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
index 2e0c0af..c465f1b 100644
--- a/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
@@ -20,7 +20,7 @@ use Symfony\Component\Serializer\SerializerInterface;
  * @author John Wards <jwards@whiteoctober.co.uk>
  * @author Fabian Vogler <fabian@equivalence.ch>
  */
-class XmlEncoder extends AbstractEncoder
+class XmlEncoder extends AbstractEncoder implements DecoderInterface
 {
     private $dom;
     private $format;
diff --git a/src/Symfony/Component/Serializer/SerializerAwareInterface.php b/src/Symfony/Component/Serializer/SerializerAwareInterface.php
new file mode 100644
index 0000000..625601e
--- /dev/null
+++ b/src/Symfony/Component/Serializer/SerializerAwareInterface.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Symfony\Component\Serializer;
+
+use Symfony\Component\Serializer\SerializerInterface;
+
+/*
+ * This file is part of the Symfony framework.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+/**
+ * Defines the interface of encoders
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+interface SerializerAwareInterface
+{
+    /**
+     * Sets the owning Serializer object
+     *
+     * @param SerializerInterface $serializer
+     * @api
+     */
+    function setSerializer(SerializerInterface $serializer);
+
+    /**
+     * Gets the owning Serializer object
+     *
+     * @return SerializerInterface
+     * @api
+     */
+    function getSerializer();
+}