diff --git a/oauth3.domains.js b/oauth3.domains.js
index e108648..833a745 100644
--- a/oauth3.domains.js
+++ b/oauth3.domains.js
@@ -52,7 +52,7 @@ OAUTH3.api['domains.extend'] = function (providerUri, opts) {
   return OAUTH3.request({
     method: 'POST'
   , url: OAUTH3.url.normalize(providerUri)
-      + '/api/com.daplie.domains/accounts/' + session.token.sub + '/registrations'
+      + '/api/com.daplie.domains/accounts/' + session.token.sub + '/registrations/' + opts.tld + '/' + opts.sld + '/extend'
   , session: session
   , data: opts.data
   }).then(function (res) {