diff --git a/roles/global_defaults/tasks/validation.yml b/roles/global_defaults/tasks/validation.yml
index def7feb..eda9916 100644
--- a/roles/global_defaults/tasks/validation.yml
+++ b/roles/global_defaults/tasks/validation.yml
@@ -310,8 +310,8 @@
     system_disk_mounts: >-
       {{
         (system_cfg.disks | default([]))
-        | map(attribute='mount')
-        | map(attribute='path')
+        | map(attribute='mount', default={})
+        | map(attribute='path', default='')
         | map('string')
         | map('trim')
         | reject('equalto', '')