diff --git a/playbooks/roles/borg-backup-server/tasks/main.yaml b/playbooks/roles/borg-backup-server/tasks/main.yaml
index 914b5c4a2a..5ea555008d 100644
--- a/playbooks/roles/borg-backup-server/tasks/main.yaml
+++ b/playbooks/roles/borg-backup-server/tasks/main.yaml
@@ -56,7 +56,7 @@
 
 - name: Build all borg users from backup hosts
   set_fact:
-    borg_users: '{{ borg_users }} + [ {{ hostvars[item]["borg_user"] }} ]'
+    borg_users: '{{ borg_users + [hostvars[item]["borg_user"]] }}'
   with_inventory_hostnames: 'borg-backup:!disabled'
 
 - name: Create borg users