diff --git a/NucleicRemote/NucleicRemote/Models/RemoteStore.swift b/NucleicRemote/NucleicRemote/Models/RemoteStore.swift
index 1c32681..6c4f67b 100644
--- a/NucleicRemote/NucleicRemote/Models/RemoteStore.swift
+++ b/NucleicRemote/NucleicRemote/Models/RemoteStore.swift
@@ -530,6 +530,11 @@ final class RemoteStore: ObservableObject {
             IdentityStore.savePairedHost(host)
             self.activeHostID = host.fingerprint
         }
+        cb.meshRosterChanged = { [weak self] in
+            // Mesh "join": a Mac was learned or revoked via gossip. Reconnect to every paired Mac
+            // (connecting the newcomer) and drop any that left — without switching the active host.
+            self?.reconnect()
+        }
         cb.tailnetStatus = { [weak self] status, loginURL in
             self?.tailnetStatus = status
             self?.tailnetLoginURL = loginURL