diff --git a/erpnext/patches/v4_1/fix_jv_remarks.py b/erpnext/patches/v4_1/fix_jv_remarks.py
index 3b2f342231..99797e10f3 100644
--- a/erpnext/patches/v4_1/fix_jv_remarks.py
+++ b/erpnext/patches/v4_1/fix_jv_remarks.py
@@ -6,6 +6,7 @@ import frappe
 
 def execute():
 	reference_date = guess_reference_date()
+	frappe.reload_doc('accounts', 'doctype', 'journal_voucher_detail')
 	for name in frappe.db.sql_list("""select name from `tabJournal Voucher`
 		where date(creation)>=%s""", reference_date):
 		jv = frappe.get_doc("Journal Voucher", name)
diff --git a/erpnext/patches/v4_2/recalculate_bom_costs.py b/erpnext/patches/v4_2/recalculate_bom_costs.py
index c05fd03709..37f04131b0 100644
--- a/erpnext/patches/v4_2/recalculate_bom_costs.py
+++ b/erpnext/patches/v4_2/recalculate_bom_costs.py
@@ -5,6 +5,7 @@ from __future__ import unicode_literals
 import frappe
 
 def execute():
+	frappe.reload_doc('manufacturing', 'doctype', 'bom_operation')
 	for d in frappe.db.sql("""select bom.name from `tabBOM` bom where bom.docstatus < 2 and
 		exists(select bom_op.name from `tabBOM Operation` bom_op where
 		bom.name = bom_op.parent and bom_op.fixed_cycle_cost IS NOT NULL)""", as_dict=1):