diff --git a/config.yaml b/config.yaml
index ebaee797..44304c39 100644
--- a/config.yaml
+++ b/config.yaml
@@ -220,4 +220,10 @@ options:
           juju-myservice-0
       If you're running multiple environments with the same services in them
       this allows you to differentiate between them.
+  nagios_servicegroups:
+    default: ""
+    type: string
+    description: |
+      A comma-separated list of nagios servicegroups.
+      If left empty, the nagios_context will be used as the servicegroup