diff --git a/roles/ceph-osd/tasks/system_tuning.yml b/roles/ceph-osd/tasks/system_tuning.yml
index 21ff94d28..86a157a8d 100644
--- a/roles/ceph-osd/tasks/system_tuning.yml
+++ b/roles/ceph-osd/tasks/system_tuning.yml
@@ -56,6 +56,6 @@
     sysctl_set: yes
     ignoreerrors: yes
   with_items:
-    - { name: "fs.aio-max-nr", value: "1048576", enable: (osd_objectstore == 'bluestore') }
+    - { name: "fs.aio-max-nr", value: "1048576", enable: "{{ osd_objectstore == 'bluestore' }}" }
     - "{{ os_tuning_params }}"
   when: item.enable | default(true) | bool