diff --git a/addons/sale_purchase/models/sale_order.py b/addons/sale_purchase/models/sale_order.py
index 0b85753411f..7822271f9e0 100644
--- a/addons/sale_purchase/models/sale_order.py
+++ b/addons/sale_purchase/models/sale_order.py
@@ -71,12 +71,12 @@ class SaleOrderLine(models.Model):
     _inherit = 'sale.order.line'
 
     purchase_line_ids = fields.One2many('purchase.order.line', 'sale_line_id', string="Generated Purchase Lines", readonly=True, help="Purchase line generated by this Sales item on order confirmation, or when the quantity was increased.")
-    purchase_line_count = fields.Integer("Number of generated purchase items", compute='_compute_purchase_count', compute_sudo=True)
+    purchase_line_count = fields.Integer("Number of generated purchase items", compute='_compute_purchase_count')
 
     @api.multi
     @api.depends('purchase_line_ids')
     def _compute_purchase_count(self):
-        database_data = self.env['purchase.order.line'].read_group([('sale_line_id', 'in', self.ids)], ['sale_line_id'], ['sale_line_id'])
+        database_data = self.env['purchase.order.line'].sudo().read_group([('sale_line_id', 'in', self.ids)], ['sale_line_id'], ['sale_line_id'])
         mapped_data = dict([(db['sale_line_id'][0], db['sale_line_id_count']) for db in database_data])
         for line in self:
             line.purchase_line_count = mapped_data.get(line.id, 0)