diff --git a/acme/acme/client.py b/acme/acme/client.py
index c7ed7337c..83ec0c2ad 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -215,6 +215,7 @@ class Client(object):  # pylint: disable=too-many-instance-attributes
         order = messages.NewOrder(identifiers=identifiers)
         response = self.net.post(self.directory.new_order, order)
         order_response = self._order_resource_from_response(response)
+        order_response.csr = csr
         return order_response
 
     def request_challenges(self, identifier, new_authzr_uri=None):
diff --git a/acme/acme/messages.py b/acme/acme/messages.py
index 6db438fc0..6b754f6b2 100644
--- a/acme/acme/messages.py
+++ b/acme/acme/messages.py
@@ -504,6 +504,7 @@ class OrderResource(ResourceWithURI):
 
     """
     body = jose.Field('body', decoder=Order.from_json)
+    csr = jose.Field('csr', omitempty=True)
     authorizations = jose.Field('authorizations')
     fullchain_pem = jose.Field('fullchain_pem', omitempty=True)