2 files changed, 3 insertions, 1 deletions
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 312acff3d6..cf08a1cd55 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -95,6 +95,8 @@ class EventTypes(object):
     ServerACL = "m.room.server_acl"
     Pinned = "m.room.pinned_events"
 
+    Retention = "m.room.retention"
+
 
 class RejectedReason(object):
     AUTH_ERROR = "auth_error"
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index cca92c34ba..5853a54c95 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -457,7 +457,7 @@ def cs_error(msg, code=Codes.UNKNOWN, **kwargs):
 
 
 class FederationError(RuntimeError):
-    """  This class is used to inform remote home servers about erroneous
+    """  This class is used to inform remote homeservers about erroneous
     PDUs they sent us.
 
     FATAL: The remote server could not interpret the source event.