diff --git a/event-schemas/schema/v1/m.room.create b/event-schemas/schema/v1/m.room.create
index f2e1ee92..bcbb10d2 100644
--- a/event-schemas/schema/v1/m.room.create
+++ b/event-schemas/schema/v1/m.room.create
@@ -12,6 +12,10 @@
                 "creator": {
                     "type": "string",
                     "description": "The ``user_id`` of the room creator. This is set by the homeserver."
+                },
+                "m.federate": {
+                    "type": "boolean",
+                    "description": "Whether users on other servers can join this room."
                 }
             },
             "required": ["creator"]