diff --git a/lib/blinkbox/user/zuul_client.rb b/lib/blinkbox/user/zuul_client.rb
index b9da73b..5be5569 100644
--- a/lib/blinkbox/user/zuul_client.rb
+++ b/lib/blinkbox/user/zuul_client.rb
@@ -80,7 +80,8 @@ def register_user(user, client_options = {})
         allow_marketing_communications: user.allow_marketing_communications
       }
       params.merge!(client_options)
-      http_post "/oauth2/token", params
+      response = http_post "/oauth2/token", params
+      response.response != 200 ? response.response : MultiJson.load(response.body)
     end
 
     def register_user_with_client(user, client)