diff --git a/addons/sale_timesheet/models/product.py b/addons/sale_timesheet/models/product.py
index 730f9f206aa..8ea40e9c7ca 100644
--- a/addons/sale_timesheet/models/product.py
+++ b/addons/sale_timesheet/models/product.py
@@ -35,6 +35,9 @@ class ProductTemplate(models.Model):
     def _compute_service_upsell_threshold_ratio(self):
         product_uom_hour = self.env.ref('uom.product_uom_hour')
         for record in self:
+            if not record.uom_id:
+                record.service_upsell_threshold_ratio = False
+                continue
             record.service_upsell_threshold_ratio = f"1 {record.uom_id.name} = {product_uom_hour.factor / record.uom_id.factor:.2f} Hours"
 
     def _compute_visible_expense_policy(self):