diff --git a/lib/Alchemy/Phrasea/Media/MediaTypeFactory.php b/lib/Alchemy/Phrasea/Media/MediaTypeFactory.php
index 33a351ce5f..2bc93f907f 100644
--- a/lib/Alchemy/Phrasea/Media/MediaTypeFactory.php
+++ b/lib/Alchemy/Phrasea/Media/MediaTypeFactory.php
@@ -30,6 +30,8 @@ class MediaTypeFactory
                 return new Type\Document();
             case Type\Type::TYPE_FLASH:
                 return new Type\Flash();
+            case Type\Type::TYPE_UNKNOWN:
+                return new Type\Unknown();
         }
 
         throw new \RuntimeException('Could not create requested media type');
diff --git a/lib/Alchemy/Phrasea/Media/Type/Type.php b/lib/Alchemy/Phrasea/Media/Type/Type.php
index 6febd03a9c..731ced8149 100644
--- a/lib/Alchemy/Phrasea/Media/Type/Type.php
+++ b/lib/Alchemy/Phrasea/Media/Type/Type.php
@@ -18,6 +18,7 @@ interface Type
     const TYPE_DOCUMENT = 'document';
     const TYPE_FLASH = 'flash';
     const TYPE_IMAGE = 'image';
+    const TYPE_UNKNOWN = 'unknown';
 
     public function getType();
 }
diff --git a/lib/Alchemy/Phrasea/Media/Type/Unknown.php b/lib/Alchemy/Phrasea/Media/Type/Unknown.php
new file mode 100644
index 0000000000..1b22583be9
--- /dev/null
+++ b/lib/Alchemy/Phrasea/Media/Type/Unknown.php
@@ -0,0 +1,21 @@
+<?php
+
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2016 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Alchemy\Phrasea\Media\Type;
+
+class Unknown implements Type
+{
+
+    public function getType()
+    {
+        return self::TYPE_UNKNOWN;
+    }
+}