diff --git a/rest_framework/status.py b/rest_framework/status.py
index a8398fa37..c6ca4e00c 100644
--- a/rest_framework/status.py
+++ b/rest_framework/status.py
@@ -69,6 +69,7 @@ HTTP_417_EXPECTATION_FAILED = 417
 HTTP_422_UNPROCESSABLE_ENTITY = 422
 HTTP_423_LOCKED = 423
 HTTP_424_FAILED_DEPENDENCY = 424
+HTTP_426_UPGRADE_REQUIRED = 426
 HTTP_428_PRECONDITION_REQUIRED = 428
 HTTP_429_TOO_MANY_REQUESTS = 429
 HTTP_431_REQUEST_HEADER_FIELDS_TOO_LARGE = 431