diff --git a/lib/tunnelbroker/use-peer-to-peer-message-handler.js b/lib/tunnelbroker/use-peer-to-peer-message-handler.js
--- a/lib/tunnelbroker/use-peer-to-peer-message-handler.js
+++ b/lib/tunnelbroker/use-peer-to-peer-message-handler.js
@@ -8,7 +8,10 @@
   useBroadcastDeviceListUpdates,
   useGetAndUpdateDeviceListsForUsers,
 } from '../hooks/peer-list-hooks.js';
-import { getForeignPeerDevices } from '../selectors/user-selectors.js';
+import {
+  getAllPeerDevices,
+  getForeignPeerDevices,
+} from '../selectors/user-selectors.js';
 import {
   verifyAndGetDeviceList,
   removeDeviceFromDeviceList,
@@ -40,6 +43,7 @@
   const foreignPeerDevices = useSelector(getForeignPeerDevices);
   const broadcastDeviceListUpdates = useBroadcastDeviceListUpdates();
   const getAndUpdateDeviceListsForUsers = useGetAndUpdateDeviceListsForUsers();
+  const allPeerDevices = useSelector(getAllPeerDevices);
 
   return React.useCallback(
     async (message: PeerToPeerMessage, messageID: string) => {
@@ -143,7 +147,9 @@
               userID,
               deviceIDToLogOut,
             );
-            // TODO: broadcast device list update here
+            await broadcastDeviceListUpdates(
+              allPeerDevices.filter(deviceID => deviceID !== deviceIDToLogOut),
+            );
           } catch (e) {
             console.log(e);
           }
@@ -257,6 +263,7 @@
       identityClient,
       olmAPI,
       sqliteAPI,
+      allPeerDevices,
     ],
   );
 }