diff --git a/src/Symfony/Component/Config/Resource/DirectoryResource.php b/src/Symfony/Component/Config/Resource/DirectoryResource.php
index c2c1e58959..0a4c39d151 100644
--- a/src/Symfony/Component/Config/Resource/DirectoryResource.php
+++ b/src/Symfony/Component/Config/Resource/DirectoryResource.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Config\Resource;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-class DirectoryResource implements ResourceInterface, \Serializable
+class DirectoryResource implements ResourceInterface
 {
     private $resource;
     private $pattern;
diff --git a/src/Symfony/Component/Config/Resource/FileResource.php b/src/Symfony/Component/Config/Resource/FileResource.php
index 9d699dae00..2ebc39f2da 100644
--- a/src/Symfony/Component/Config/Resource/FileResource.php
+++ b/src/Symfony/Component/Config/Resource/FileResource.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\Config\Resource;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-class FileResource implements ResourceInterface, \Serializable
+class FileResource implements ResourceInterface
 {
     private $resource;
 
diff --git a/src/Symfony/Component/Config/Resource/ResourceInterface.php b/src/Symfony/Component/Config/Resource/ResourceInterface.php
index b4529e8de6..7febbd8139 100644
--- a/src/Symfony/Component/Config/Resource/ResourceInterface.php
+++ b/src/Symfony/Component/Config/Resource/ResourceInterface.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Config\Resource;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-interface ResourceInterface
+interface ResourceInterface extends \Serializable
 {
     /**
      * Returns a string representation of the Resource.