diff --git a/src/Symfony/Components/DependencyInjection/Loader/XmlFileLoader.php b/src/Symfony/Components/DependencyInjection/Loader/XmlFileLoader.php
index 688202067fe1..d0a9a442206d 100644
--- a/src/Symfony/Components/DependencyInjection/Loader/XmlFileLoader.php
+++ b/src/Symfony/Components/DependencyInjection/Loader/XmlFileLoader.php
@@ -382,7 +382,19 @@ static public function convertDomElementToArray(\DomElement $element)
       }
       elseif (!$node instanceof \DOMComment)
       {
-        $config[$node->localName] = static::convertDomElementToArray($node);
+        if (isset($config[$node->localName]))
+        {
+          if (!is_array($config[$node->localName]))
+          {
+            $config[$node->localName] = array($config[$node->localName]);
+          }
+          $config[$node->localName][] = static::convertDomElementToArray($node);
+        }
+        else
+        {
+          $config[$node->localName] = static::convertDomElementToArray($node);
+        }
+
         $empty = false;
       }
     }