diff --git a/alerts/kube_apiserver.libsonnet b/alerts/kube_apiserver.libsonnet
index e7348d488..d67bbf3ed 100644
--- a/alerts/kube_apiserver.libsonnet
+++ b/alerts/kube_apiserver.libsonnet
@@ -96,7 +96,7 @@ local utils = import '../lib/utils.libsonnet';
             },
             annotations: {
               description: 'Kubernetes aggregated API {{ $labels.instance }}/{{ $labels.name }} has reported {{ $labels.reason }} errors%s.' % [
-                (utils.ifShowMultiCluster($._config, ' on cluster {{ $labels.%(clusterLabel)s }}' % $._config),
+                utils.ifShowMultiCluster($._config, ' on cluster {{ $labels.%(clusterLabel)s }}' % $._config),
               ],
               summary: 'Kubernetes aggregated API has reported errors.',
             },