diff --git a/global/overlay/etc/puppet/cosmos-rules.yaml b/global/overlay/etc/puppet/cosmos-rules.yaml
index 84603a74..d071d1dc 100644
--- a/global/overlay/etc/puppet/cosmos-rules.yaml
+++ b/global/overlay/etc/puppet/cosmos-rules.yaml
@@ -1264,7 +1264,7 @@ log-qa-sto1-1.komreg.net:
    sunet::dockerhost2:
    eid::telegraf2:
       server_type: 'log'
-      ports: ['127.0.0.1:9999:9999']
+      ports: '127.0.0.1:9999:9999'
    sunet::fticks:
       args: -j
       url: http://127.0.0.1:9999/telegraf