diff --git a/embed/examples/cluster/topology.example.yaml b/embed/examples/cluster/topology.example.yaml
index 0edac37932..c81f4824fe 100644
--- a/embed/examples/cluster/topology.example.yaml
+++ b/embed/examples/cluster/topology.example.yaml
@@ -327,3 +327,5 @@ alertmanager_servers:
     # data_dir: "/tidb-data/alertmanager-9093"
     # # Alertmanager log file storage directory.
     # log_dir: "/tidb-deploy/alertmanager-9093/log"
+    # # Alertmanager config file storage directory.
+    # config_file: "/tidb-deploy/alertmanager-9093/bin/alertmanager/alertmanager.yml"