diff --git a/upup/models/cloudup/resources/addons/metrics-server.addons.k8s.io/k8s-1.11.yaml.template b/upup/models/cloudup/resources/addons/metrics-server.addons.k8s.io/k8s-1.11.yaml.template
index 4decbf8d4f..225134a3f3 100644
--- a/upup/models/cloudup/resources/addons/metrics-server.addons.k8s.io/k8s-1.11.yaml.template
+++ b/upup/models/cloudup/resources/addons/metrics-server.addons.k8s.io/k8s-1.11.yaml.template
@@ -137,7 +137,7 @@ spec:
 {{ else }}
           - --cert-dir=/tmp
 {{ end }}
-{{ if not UseKopsControllerForNodeBootstrap }}
+{{ if and UseKopsControllerForNodeBootstrap (not (WithDefaultBool .MetricsServer.Insecure true)) }}
           - --kubelet-insecure-tls
 {{ end }}
         image: {{ or .MetricsServer.Image "k8s.gcr.io/metrics-server/metrics-server:v0.4.3" }}