diff --git a/addons/hr_holidays/hr_holidays.py b/addons/hr_holidays/hr_holidays.py
index 9d6328af1eb..d0a52d8a4de 100644
--- a/addons/hr_holidays/hr_holidays.py
+++ b/addons/hr_holidays/hr_holidays.py
@@ -294,8 +294,8 @@ class hr_holidays(osv.osv):
 
             # If a category that created several holidays, cancel all related
             wf_service = netsvc.LocalService("workflow")
-            for id in record.linked_request_ids or []:
-                wf_service.trg_validate(uid, 'hr.holidays', id, 'cancel', cr)
+            for res in record.linked_request_ids:
+                wf_service.trg_validate(uid, 'hr.holidays', res.id, 'cancel', cr)
 
         return True