diff --git a/tasks/create-cert-standalone.yml b/tasks/create-cert-standalone.yml
index 9523f23..34986e0 100644
--- a/tasks/create-cert-standalone.yml
+++ b/tasks/create-cert-standalone.yml
@@ -33,7 +33,9 @@
     owner: root
     group: root
     mode: 0750
-  when: certbot_create_standalone_stop_services is defined and certbot_create_standalone_stop_services
+  when:
+    - certbot_create_standalone_stop_services is defined
+    - certbot_create_standalone_stop_services
 
 - name: Generate new certificate if one doesn't exist.
   command: "{{ certbot_create_command }}"