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diff --git a/doc/administration/environment_variables.md b/doc/administration/environment_variables.md
index b6676026d06..9bcd13a52f7 100644
--- a/doc/administration/environment_variables.md
+++ b/doc/administration/environment_variables.md
@@ -13,6 +13,7 @@ override certain values.
Variable | Type | Description
-------- | ---- | -----------
+`GITLAB_CDN_HOST` | string | Sets the hostname for a CDN to serve static assets (e.g. `mycdnsubdomain.fictional-cdn.com`)
`GITLAB_ROOT_PASSWORD` | string | Sets the password for the `root` user on installation
`GITLAB_HOST` | string | The full URL of the GitLab server (including `http://` or `https://`)
`RAILS_ENV` | string | The Rails environment; can be one of `production`, `development`, `staging` or `test`
@@ -58,6 +59,9 @@ to the naming scheme `GITLAB_#{name in 1_settings.rb in upper case}`.
## Omnibus configuration
+To set environment variables, follow [these
+instructions](https://docs.gitlab.com/omnibus/settings/environment-variables.html).
+
It's possible to preconfigure the GitLab docker image by adding the environment
variable `GITLAB_OMNIBUS_CONFIG` to the `docker run` command.
For more information see the ['preconfigure-docker-container' section in the Omnibus documentation](http://docs.gitlab.com/omnibus/docker/#preconfigure-docker-container).