diff --git a/partner-datacell.js b/partner-datacell.js
index 418f593..7fc9ad7 100644
--- a/partner-datacell.js
+++ b/partner-datacell.js
@@ -91,10 +91,10 @@ function topupRequest(task, retry) {
         {
             method: 'PUT',
             uri: 'config.h2h_out.partner',
-            multipart: [
+            multipart: [{
                 'content-type': 'text/xml',
                 body: payload_xml
-            ]
+            }]
         },
         
         function(error, response, body) {