diff --git a/addons/mrp/report/mrp_report_bom_structure.py b/addons/mrp/report/mrp_report_bom_structure.py
index 515fc1cc76b..a726e342751 100644
--- a/addons/mrp/report/mrp_report_bom_structure.py
+++ b/addons/mrp/report/mrp_report_bom_structure.py
@@ -96,7 +96,7 @@ class ReportBomStructure(models.AbstractModel):
         bom_quantity = line_qty
         if line_id:
             current_line = self.env['mrp.bom.line'].browse(int(line_id))
-            bom_quantity = current_line.product_uom_id._compute_quantity(line_qty, bom.product_uom_id)
+            bom_quantity = current_line.product_uom_id._compute_quantity(line_qty, bom.product_uom_id) or 0
         # Display bom components for current selected product variant
         if product_id:
             product = self.env['product.product'].browse(int(product_id))