diff --git a/erpnext/manufacturing/doctype/bom/bom.json b/erpnext/manufacturing/doctype/bom/bom.json
index 04774d4f2a8..ab8586aaef1 100644
--- a/erpnext/manufacturing/doctype/bom/bom.json
+++ b/erpnext/manufacturing/doctype/bom/bom.json
@@ -548,12 +548,14 @@
   {
    "fieldname": "process_loss_percentage",
    "fieldtype": "Percent",
-   "label": "% Process Loss"
+   "label": "% Process Loss",
+   "non_negative": 1
   },
   {
    "fieldname": "process_loss_qty",
    "fieldtype": "Float",
    "label": "Process Loss Qty",
+   "non_negative": 1,
    "read_only": 1
   },
   {
@@ -639,7 +641,7 @@
  "image_field": "image",
  "is_submittable": 1,
  "links": [],
- "modified": "2025-10-29 17:43:12.966753",
+ "modified": "2025-11-19 16:17:15.925156",
  "modified_by": "Administrator",
  "module": "Manufacturing",
  "name": "BOM",