diff --git a/erpnext/patches/v10_0/fix_reserved_qty_for_sub_contract.py b/erpnext/patches/v10_0/fix_reserved_qty_for_sub_contract.py
index 5d02537..ded44e8 100644
--- a/erpnext/patches/v10_0/fix_reserved_qty_for_sub_contract.py
+++ b/erpnext/patches/v10_0/fix_reserved_qty_for_sub_contract.py
@@ -6,6 +6,7 @@
 from erpnext.stock.utils import get_bin
 
 def execute():
+	frappe.reload_doc("stock", "doctype", "bin")
 	frappe.reload_doc("buying", "doctype", "purchase_order_item_supplied")
 	for d in frappe.db.sql("""
 		select distinct rm_item_code, reserve_warehouse