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-rw-r--r--changelog.d/4411.bugfix1
-rw-r--r--synapse/api/constants.py1
-rw-r--r--synapse/handlers/room.py1
3 files changed, 3 insertions, 0 deletions
diff --git a/changelog.d/4411.bugfix b/changelog.d/4411.bugfix
new file mode 100644
index 0000000000..219e98a924
--- /dev/null
+++ b/changelog.d/4411.bugfix
@@ -0,0 +1 @@
+Ensure encrypted room state is persisted across room upgrades.
\ No newline at end of file
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 022f772714..46c4b4b9dc 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -68,6 +68,7 @@ class EventTypes(object):
     Aliases = "m.room.aliases"
     Redaction = "m.room.redaction"
     ThirdPartyInvite = "m.room.third_party_invite"
+    Encryption = "m.room.encryption"
 
     RoomHistoryVisibility = "m.room.history_visibility"
     CanonicalAlias = "m.room.canonical_alias"
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 581e96c743..cb8c5f77dd 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -269,6 +269,7 @@ class RoomCreationHandler(BaseHandler):
             (EventTypes.RoomHistoryVisibility, ""),
             (EventTypes.GuestAccess, ""),
             (EventTypes.RoomAvatar, ""),
+            (EventTypes.Encryption, ""),
         )
 
         old_room_state_ids = yield self.store.get_filtered_current_state_ids(