diff --git a/tasks/create-cert-standalone.yml b/tasks/create-cert-standalone.yml
index 4198d35..ce1a14c 100644
--- a/tasks/create-cert-standalone.yml
+++ b/tasks/create-cert-standalone.yml
@@ -28,7 +28,7 @@
     mode: 0750
   when:
     - certbot_create_standalone_stop_services is defined
-    - certbot_create_standalone_stop_services
+    - certbot_create_standalone_stop_services is iterable
 
 - name: Create post hook to start services.
   template:
@@ -39,7 +39,7 @@
     mode: 0750
   when:
     - certbot_create_standalone_stop_services is defined
-    - certbot_create_standalone_stop_services
+    - certbot_create_standalone_stop_services is iterable
 
 - name: Check if domains have changed
   block: