diff --git a/apps/emqx_management/src/emqx_mgmt_api_clients.erl b/apps/emqx_management/src/emqx_mgmt_api_clients.erl
index e89561122..f1374aa26 100644
--- a/apps/emqx_management/src/emqx_mgmt_api_clients.erl
+++ b/apps/emqx_management/src/emqx_mgmt_api_clients.erl
@@ -678,6 +678,7 @@ format_channel_info({_, ClientInfo, ClientStats}) ->
         , sockname
         , retry_interval
         , upgrade_qos
+        , id %% sessionID, defined in emqx_session.erl
     ],
     TimesKeys = [created_at, connected_at, disconnected_at],
     %% format timestamp to rfc3339