diff --git a/docs/content/advanced/mail-fetchmail.md b/docs/content/advanced/mail-fetchmail.md
index b7b44c9f..52625cf6 100644
--- a/docs/content/advanced/mail-fetchmail.md
+++ b/docs/content/advanced/mail-fetchmail.md
@@ -1,9 +1,12 @@
 # Warning! Not yet implemented feature
 
 To enable the `fetchmail` service to retrieve e-mails set the environment variable `ENABLE_FETCHMAIL` to `1`
-Your docker-compose.yml file should look like following snippet:
+Your `docker-compose.yml` file should look like following snippet:
 
 ```
-- ENABLE_FETCHMAIL=1
+...
+environment:
+  - ENABLE_FETCHMAIL=1
+...
 ```