1 files changed, 2 insertions, 1 deletions

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

index 5041828f18..eddd889778 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -36,7 +36,8 @@ class Codes(object):
     CAPTCHA_NEEDED = "M_CAPTCHA_NEEDED"
     CAPTCHA_INVALID = "M_CAPTCHA_INVALID"
     MISSING_PARAM = "M_MISSING_PARAM",
-    TOO_LARGE = "M_TOO_LARGE"
+    TOO_LARGE = "M_TOO_LARGE",
+    EXCLUSIVE = "M_EXCLUSIVE"
 
 
 class CodeMessageException(RuntimeError):