diff --git a/data/event-schemas/examples/m.room.member.yaml b/data/event-schemas/examples/m.room.member.yaml
index 5147b258..85e9a9eb 100644
--- a/data/event-schemas/examples/m.room.member.yaml
+++ b/data/event-schemas/examples/m.room.member.yaml
@@ -1,6 +1,7 @@
 {
   "$ref": "core/state_event.json",
   "state_key": "@alice:example.org",
+  "sender": "@alice:example.org",
   "type": "m.room.member",
   "content": {
     "membership": "join",