diff --git a/addons/hr_expense/models/hr_expense.py b/addons/hr_expense/models/hr_expense.py
index 411700f6a72..293995b7eb6 100644
--- a/addons/hr_expense/models/hr_expense.py
+++ b/addons/hr_expense/models/hr_expense.py
@@ -1076,6 +1076,7 @@ class HrExpenseSheet(models.Model):
         return res
 
     def action_unpost(self):
+        self = self.with_context(clean_context(self.env.context))
         for sheet in self:
             move = sheet.account_move_id
             sheet.account_move_id = False