diff --git a/acme/acme/client.py b/acme/acme/client.py
index b8b145720..c3a603b7e 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -92,18 +92,17 @@ class Client(object):  # pylint: disable=too-many-instance-attributes
     def register(self, new_reg=None):
         """Register.
 
-        :param .NewRegistration or .NewAccount new_reg:
+        :param .NewRegistration new_reg:
 
         :returns: Registration Resource.
         :rtype: `.RegistrationResource`
 
         """
+        new_reg = messages.NewRegistration() if new_reg is None else new_reg
         if self.acme_version == 2:
             url = self.directory.new_account
-            new_reg = messages.NewAccount() if new_reg is None else new_reg
         else:
             url = self.directory.new_reg
-            new_reg = messages.NewRegistration() if new_reg is None else new_reg
 
         response = self.net.post(url, new_reg)
         # TODO: handle errors
diff --git a/acme/acme/messages.py b/acme/acme/messages.py
index 2c1a198eb..4b4fa5003 100644
--- a/acme/acme/messages.py
+++ b/acme/acme/messages.py
@@ -288,13 +288,6 @@ class NewRegistration(Registration):
     resource = fields.Resource(resource_type)
 
 
-@Directory.register
-class NewAccount(Registration):
-    """New account."""
-    resource_type = 'new-account' # not used
-    resource = fields.Resource(resource_type)
-
-
 class UpdateRegistration(Registration):
     """Update registration."""
     resource_type = 'reg'