diff --git a/packages/server/src/routes/federation.ts b/packages/server/src/routes/federation.ts
index e2cc9724..1dab41c1 100644
--- a/packages/server/src/routes/federation.ts
+++ b/packages/server/src/routes/federation.ts
@@ -2357,6 +2357,7 @@ function processMemberAddEvent(
 
     const bootstrapResult = {
       id: channelId,
+      federatedId: event.federatedId,
       ownerId,
       createdAt: now,
       members: memberUsers.map(u => sanitizeUser(u)),