diff --git a/op-guide/configuration.md b/op-guide/configuration.md
index a3dd451f5fb4f..7262245fa8f00 100644
--- a/op-guide/configuration.md
+++ b/op-guide/configuration.md
@@ -11,6 +11,12 @@ TiDB, TiKV and PD are configurable using command-line flags and environment vari
 
 The default TiDB ports are 4000 for client requests and 10080 for status report.
 
+### `--advertise-address`
+
+- The IP address on which to advertise the apiserver to the TiDB server
+- Default: ""
+- This address must be reachable by the rest of the TiDB cluster and the user.
+
 ### `--binlog-socket`
 
 - The TiDB services use the unix socket file for internal connections, such as the Pump service