diff --git a/templates/linux-mac-common.html b/templates/linux-mac-common.html
index 6151cd8..290188b 100644
--- a/templates/linux-mac-common.html
+++ b/templates/linux-mac-common.html
@@ -68,7 +68,9 @@ <h3>Run configuration commands</h3>
       <img class="clippy" width="13" src="{{ .Web_Path_Prefix }}static/clippy.svg" alt="">
     </button>
   <pre><code>kubectl config set-cluster {{ .ClusterName }} \
+  {{- if or .K8sCaPem .K8sCaURI }}
     --certificate-authority=${HOME}/.kube/certs/{{ .ClusterName}}/k8s-ca.crt \
+  {{- end }}
     --server={{ .K8sMasterURI }}</code></pre>
   </div>