diff --git a/djangorestframework/status.py b/djangorestframework/status.py
index 684c9b380..40b4d0dfc 100644
--- a/djangorestframework/status.py
+++ b/djangorestframework/status.py
@@ -40,6 +40,13 @@ HTTP_414_REQUEST_URI_TOO_LONG = 414
 HTTP_415_UNSUPPORTED_MEDIA_TYPE = 415
 HTTP_416_REQUESTED_RANGE_NOT_SATISFIABLE = 416
 HTTP_417_EXPECTATION_FAILED = 417
+
+# http://tools.ietf.org/html/rfc6585
+HTTP_428_PRECONDITION_REQUIRED = 428
+HTTP_429_TOO_MANY_REQUESTS = 429
+HTTP_431_REQUEST_HEADER_FIELDS_TOO_LARGE = 431
+# end
+
 HTTP_500_INTERNAL_SERVER_ERROR = 500
 HTTP_501_NOT_IMPLEMENTED = 501
 HTTP_502_BAD_GATEWAY = 502