diff --git a/docs/sources/configuration/_index.md b/docs/sources/configuration/_index.md
index 796525ea38ce8..6c7525fbc0bf7 100644
--- a/docs/sources/configuration/_index.md
+++ b/docs/sources/configuration/_index.md
@@ -201,7 +201,7 @@ The `server_config` block configures the HTTP and gRPC server of the launched se
 
 # Base path to serve all API routes from (e.g., /v1/).
 # CLI flag: -server.path-prefix
-[http_path_prefix: <string>]
+[http_prefix: <string> | default = "/api/prom"]
 ```
 
 ## distributor_config