diff --git a/lib/index.js b/lib/index.js
index 2ad40a43..bad088e5 100755
--- a/lib/index.js
+++ b/lib/index.js
@@ -115,6 +115,7 @@ function generateXML (data){
         'xmlns:dc':         'http://purl.org/dc/elements/1.1/',
         'xmlns:content':    'http://purl.org/rss/1.0/modules/content/',
         'xmlns:atom':       'http://www.w3.org/2005/Atom',
+        'xmlns:mi':         'http://schemas.ingestion.microsoft.com/common/',
         version: '2.0'
     };