diff --git a/addons/sale_project/models/sale_order.py b/addons/sale_project/models/sale_order.py
index c1e3e137912..58265748a31 100644
--- a/addons/sale_project/models/sale_order.py
+++ b/addons/sale_project/models/sale_order.py
@@ -39,7 +39,7 @@ class SaleOrder(models.Model):
     @api.depends('order_line.product_id.project_id')
     def _compute_tasks_ids(self):
         for order in self:
-            order.tasks_ids = self.env['project.task'].search(['&', ('display_project_id', '!=', 'False'), '|', ('sale_line_id', 'in', order.order_line.ids), ('sale_order_id', '=', order.id)])
+            order.tasks_ids = self.env['project.task'].search(['&', ('display_project_id', '!=', False), '|', ('sale_line_id', 'in', order.order_line.ids), ('sale_order_id', '=', order.id)])
             order.tasks_count = len(order.tasks_ids)
 
     @api.depends('order_line.product_id.service_tracking')