diff --git a/extraconfig/services/kubernetes-master.yaml b/extraconfig/services/kubernetes-master.yaml
index 81b2e1de85..098b46fb5d 100644
--- a/extraconfig/services/kubernetes-master.yaml
+++ b/extraconfig/services/kubernetes-master.yaml
@@ -169,7 +169,7 @@ outputs:
                   -i '{{playbook_dir}}/kubespray/inventory.yml'
                   --skip-tags docker,bastion-ssh-config
                   --extra-vars '@{{playbook_dir}}/kubespray/global_vars.yml'
-                  --private-key '{{ansible_ssh_private_key_file}}'
+                  {% if ansible_ssh_private_key_file is defined %}--private-key '{{ansible_ssh_private_key_file}}'{% endif %}
                   '{{playbook_dir}}/kubespray/playbook.yml'
                   {%- endif -%}
             - name: print kubespray command