1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index 697cf58582..20c1ab4203 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -346,6 +346,8 @@ def room_version_to_event_format(room_version):
         RoomVersions.V1, RoomVersions.V2, RoomVersions.STATE_V2_TEST,
     ):
         return EventFormatVersions.V1
+    elif room_version in (RoomVersions.V3,):
+        return EventFormatVersions.V2
     else:
         raise RuntimeError("Unrecognized room version %s" % (room_version,))