diff --git a/admin-guide/configuration/icinga2.md b/admin-guide/configuration/icinga2.md
index 9a9a0445..3e98fb20 100644
--- a/admin-guide/configuration/icinga2.md
+++ b/admin-guide/configuration/icinga2.md
@@ -9,7 +9,6 @@ But the configuration as such is not done therein, but in Hiera and automaticall
 
 ## Basic Configuration
 Enable monitoring with Icinga2 by
-
 ```
 icinga2::enable: true
 ```
@@ -18,3 +17,9 @@ icinga2::enable: true
 Users and groups in `aaa::admins` and `icinga2::web::users` will have access to these nodes on [monitoring.psi.ch](https://monitoring.psi.ch).
 Prefix the group name with a `%` to distinguish them from users.
 
+By default no alerts are generated. If you wish different, set
+```
+icinga2::alerting::enable: true
+```
+
+