diff --git a/updater/src/index.js b/updater/src/index.js
index a41a0e9..e54f627 100644
--- a/updater/src/index.js
+++ b/updater/src/index.js
@@ -47,6 +47,12 @@ const INFRA_HEALTH = {
   portal:   { host: '10.10.10.102', port: 3000 },
   auth:     { host: '10.10.10.101', port: 3001 },
   settings: { host: '10.10.10.116', port: 3080 },
+  // Shared infra, not a deployable app (no Forgejo repo — provisioned by
+  // stack-init's deploy_mqtt_broker()) — listed here only so it's a known
+  // /exec target for the portal's MQTT inspector tab and shows in the Shell
+  // tab's container list. Its /health check will always show "unreachable"
+  // since Mosquitto doesn't speak HTTP — that's expected, not a fault.
+  'mqtt-broker': { host: '10.10.10.104', port: 1883 },
 }
 const INFRA_DEPLOY = {
   portal:   { host: '10.10.10.102', path: '/opt/portal' },