diff --git a/erpnext/manufacturing/doctype/job_card_scrap_item/job_card_scrap_item.json b/erpnext/manufacturing/doctype/job_card_scrap_item/job_card_scrap_item.json
index a0ba7685d32..37fff696af9 100644
--- a/erpnext/manufacturing/doctype/job_card_scrap_item/job_card_scrap_item.json
+++ b/erpnext/manufacturing/doctype/job_card_scrap_item/job_card_scrap_item.json
@@ -51,6 +51,7 @@
    "fieldtype": "Float",
    "in_list_view": 1,
    "label": "Qty",
+   "non_negative": 1,
    "reqd": 1
   },
   {