diff --git a/lib/wsapi/authenticate_user.js b/lib/wsapi/authenticate_user.js
index 28af6a73598bf0c7d890d50a1f78dca3b7fec7c4..c25e44e60c3ee7636934ef910d9e401a8d283963 100644
--- a/lib/wsapi/authenticate_user.js
+++ b/lib/wsapi/authenticate_user.js
@@ -55,7 +55,7 @@ exports.process = function(req, res) {
             path: '/wsapi/update_password',
             method: "POST",
             headers: {
-              'Cookie': res.getHeader('set-cookie'),
+              'Cookie': res._headers['set-cookie'],
               'Content-Type': 'application/x-www-form-urlencoded',
               'Content-Length': post_body.length
             }