diff --git a/roles/ceph-common/tasks/checks/check_system.yml b/roles/ceph-common/tasks/checks/check_system.yml
index f12c930ef..1cedfdbdb 100644
--- a/roles/ceph-common/tasks/checks/check_system.yml
+++ b/roles/ceph-common/tasks/checks/check_system.yml
@@ -2,17 +2,17 @@
 - name: fail on unsupported system
   fail:
     msg: "System not supported {{ ansible_system }}"
-  when: "ansible_system not in ['Linux']"
+  when: "'{{ ansible_system }}' not in ['Linux']"
 
 - name: fail on unsupported architecture
   fail:
     msg: "Architecture not supported {{ ansible_architecture }}"
-  when: "ansible_architecture not in ['x86_64']"
+  when: "'{{ ansible_architecture }}' not in ['x86_64']"
 
 - name: fail on unsupported distribution
   fail:
     msg: "Distribution not supported {{ ansible_os_family }}"
-  when: "ansible_os_family not in ['Debian', 'RedHat']"
+  when: "'{{ ansible_os_family }}' not in ['Debian', 'RedHat']"
 
 - name: fail on unsupported distribution for red hat storage
   fail: