diff --git a/src/Composer/Package/Loader/RootPackageLoader.php b/src/Composer/Package/Loader/RootPackageLoader.php
index f0c25daba..a495f96b1 100644
--- a/src/Composer/Package/Loader/RootPackageLoader.php
+++ b/src/Composer/Package/Loader/RootPackageLoader.php
@@ -141,6 +141,10 @@ class RootPackageLoader extends ArrayLoader
             $realPackage->setPreferStable((bool) $config['prefer-stable']);
         }
 
+        if (isset($config['config'])) {
+            $realPackage->setConfig($config['config']);
+        }
+
         $repos = RepositoryFactory::defaultRepos(null, $this->config, $this->manager);
         foreach ($repos as $repo) {
             $this->manager->addRepository($repo);
diff --git a/src/Composer/Package/RootPackage.php b/src/Composer/Package/RootPackage.php
index b2e812990..79c0f502f 100644
--- a/src/Composer/Package/RootPackage.php
+++ b/src/Composer/Package/RootPackage.php
@@ -22,6 +22,7 @@ class RootPackage extends CompletePackage implements RootPackageInterface
     protected $minimumStability = 'stable';
     protected $preferStable = false;
     protected $stabilityFlags = array();
+    protected $config = array();
     protected $references = array();
     protected $aliases = array();
 
@@ -79,6 +80,24 @@ class RootPackage extends CompletePackage implements RootPackageInterface
         return $this->preferStable;
     }
 
+    /**
+     * Set the config
+     *
+     * @param array $config
+     */
+    public function setConfig($config)
+    {
+        $this->config = $config;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getConfig()
+    {
+        return $this->config;
+    }
+
     /**
      * Set the references
      *
diff --git a/src/Composer/Package/RootPackageInterface.php b/src/Composer/Package/RootPackageInterface.php
index c1cf8c1be..7a3be9d8e 100644
--- a/src/Composer/Package/RootPackageInterface.php
+++ b/src/Composer/Package/RootPackageInterface.php
@@ -58,6 +58,13 @@ interface RootPackageInterface extends CompletePackageInterface
      */
     public function getPreferStable();
 
+    /**
+     * Returns the root package's configuration
+     *
+     * @return array
+     */
+    public function getConfig();
+
     /**
      * Set the required packages
      *