diff --git a/addons/sale_project/models/project.py b/addons/sale_project/models/project.py
index 3b9a0fe4091..1f70cb886d3 100644
--- a/addons/sale_project/models/project.py
+++ b/addons/sale_project/models/project.py
@@ -152,8 +152,9 @@ class Project(models.Model):
         return action
 
     def action_open_project_invoices(self):
-        query = self.env['account.move.line']._search([('move_id.move_type', '=', 'out_invoice')])
+        query = self.env['account.move.line']._search([('move_id.move_type', 'in', ['out_invoice', 'out_refund'])])
         query.add_where('analytic_distribution ? %s', [str(self.analytic_account_id.id)])
+        query.order = None
         query_string, query_param = query.select('DISTINCT move_id')
         self._cr.execute(query_string, query_param)
         invoice_ids = [line.get('move_id') for line in self._cr.dictfetchall()]
@@ -447,8 +448,9 @@ class Project(models.Model):
         return buttons
 
     def action_open_project_vendor_bills(self):
-        query = self.env['account.move.line']._search([('move_id.move_type', '=', 'in_invoice')])
+        query = self.env['account.move.line']._search([('move_id.move_type', 'in', ['in_invoice', 'in_refund'])])
         query.add_where('analytic_distribution ? %s', [str(self.analytic_account_id.id)])
+        query.order = None
         query_string, query_param = query.select('DISTINCT move_id')
         self._cr.execute(query_string, query_param)
         vendor_bill_ids = [line.get('move_id') for line in self._cr.dictfetchall()]