diff --git a/erpnext/manufacturing/doctype/bom/bom.js b/erpnext/manufacturing/doctype/bom/bom.js
index cb96478735..1b1dc62fb1 100644
--- a/erpnext/manufacturing/doctype/bom/bom.js
+++ b/erpnext/manufacturing/doctype/bom/bom.js
@@ -83,6 +83,7 @@ cur_frm.cscript.hour_rate = function(doc, dt, dn) {
 
 
 cur_frm.cscript.time_in_mins = cur_frm.cscript.hour_rate;
+cur_frm.cscript.fixed_cycle_cost = cur_frm.cscript.hour_rate;
 
 cur_frm.cscript.item_code = function(doc, cdt, cdn) {
 	get_bom_material_detail(doc, cdt, cdn);
diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index e8a8682ceb..199ade94c4 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -285,7 +285,10 @@ class BOM(Document):
 				if not d.hour_rate:
 					d.hour_rate = flt(w[0])
 
-				fixed_cost += flt(w[1])
+				if d.fixed_cycle_cost == None:
+					d.fixed_cycle_cost= flt(w[1])
+
+				fixed_cost += d.fixed_cycle_cost
 
 			if d.hour_rate and d.time_in_mins:
 				d.operating_cost = flt(d.hour_rate) * flt(d.time_in_mins) / 60.0
diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 4c975815c5..33fa396649 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -89,3 +89,4 @@ erpnext.patches.v4_2.recalculate_bom_cost
 erpnext.patches.v4_2.fix_gl_entries_for_stock_transactions
 erpnext.patches.v4_2.update_requested_and_ordered_qty
 execute:frappe.delete_doc("DocType", "Contact Control")
+erpnext.patches.v4_2.recalculate_bom_costs
diff --git a/erpnext/patches/v4_2/recalculate_bom_costs.py b/erpnext/patches/v4_2/recalculate_bom_costs.py
new file mode 100644
index 0000000000..8c887a83f0
--- /dev/null
+++ b/erpnext/patches/v4_2/recalculate_bom_costs.py
@@ -0,0 +1,17 @@
+# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
+# License: GNU General Public License v3. See license.txt
+
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	for d in frappe.db.sql("""select name from `tabBOM` where docstatus < 2 and total_fixed_cost IS NOT NULL""", as_dict=1):
+		try:
+			bom = frappe.get_doc('BOM', d.name)
+			bom.ignore_validate_update_after_submit = True
+			bom.calculate_cost()
+			bom.save()
+			frappe.db.commit()
+		except:
+			frappe.db.rollback()
+		
\ No newline at end of file