1 files changed, 2 insertions, 1 deletions
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index b106fbed6d..b219b46a4b 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -42,8 +42,9 @@ class Codes(object):
     TOO_LARGE = "M_TOO_LARGE"
     EXCLUSIVE = "M_EXCLUSIVE"
     THREEPID_AUTH_FAILED = "M_THREEPID_AUTH_FAILED"
-    THREEPID_IN_USE = "THREEPID_IN_USE"
+    THREEPID_IN_USE = "M_THREEPID_IN_USE"
     INVALID_USERNAME = "M_INVALID_USERNAME"
+    SERVER_NOT_TRUSTED = "M_SERVER_NOT_TRUSTED"
 
 
 class CodeMessageException(RuntimeError):