diff --git a/db/migrations/0005-clear-member-cache.sql b/db/migrations/0005-clear-member-cache.sql
new file mode 100644
index 0000000..6899fe6
--- /dev/null
+++ b/db/migrations/0005-clear-member-cache.sql
@@ -0,0 +1,5 @@
+BEGIN TRANSACTION;
+
+DELETE FROM member_cache;
+
+COMMIT;
diff --git a/m2d/event-dispatcher.js b/m2d/event-dispatcher.js
index 48add81..f7e5e1b 100644
--- a/m2d/event-dispatcher.js
+++ b/m2d/event-dispatcher.js
@@ -147,6 +147,6 @@ sync.addTemporaryListener(as, "type:m.room.member", guard("m.room.member",
  */
 async event => {
 	if (event.state_key[0] !== "@") return
-	if (utils.eventSenderIsFromDiscord(event.sender)) return
-	db.prepare("REPLACE INTO member_cache (room_id, mxid, displayname, avatar_url) VALUES (?, ?, ?, ?)").run(event.room_id, event.sender, event.content.displayname || null, event.content.avatar_url || null)
+	if (utils.eventSenderIsFromDiscord(event.state_key)) return
+	db.prepare("REPLACE INTO member_cache (room_id, mxid, displayname, avatar_url) VALUES (?, ?, ?, ?)").run(event.room_id, event.state_key, event.content.displayname || null, event.content.avatar_url || null)
 }))