diff --git a/index.md b/index.md
index dff272e..306a75a 100644
--- a/index.md
+++ b/index.md
@@ -28,6 +28,7 @@ Setup [nginx](https://www.nginx.com/) webserver. Nginx is an open source reverse
   * [nginx_hsts_options](#nginx-hsts-options)
   * [nginx_keepalive_timeout](#nginx-keepalive-timeout)
   * [nginx_maps](#nginx-maps)
+  * [nginx_maps_extra](#nginx-maps-extra)
   * [nginx_official_repo_enabled](#nginx-official-repo-enabled)
   * [nginx_reset_timedout_connection](#nginx-reset-timedout-connection)
   * [nginx_send_timeout](#nginx-send-timeout)
@@ -273,6 +274,14 @@ nginx_maps:
       - "/old/path /new_path"
 ```
 
+### nginx_maps_extra
+
+#### Default value
+
+```YAML
+nginx_maps_extra: []
+```
+
 ### nginx_official_repo_enabled
 
 #### Default value