1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/api/errors.py b/synapse/api/errors.py

index b5970c959b..21ededc5ae 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -27,6 +27,7 @@ class Codes(object):
     BAD_PAGINATION = "M_BAD_PAGINATION"
     UNKNOWN = "M_UNKNOWN"
     NOT_FOUND = "M_NOT_FOUND"
+    UNKNOWN_TOKEN = "M_UNKNOWN_TOKEN"
 
 
 class CodeMessageException(Exception):