diff --git a/erpnext/manufacturing/doctype/bom/bom.py b/erpnext/manufacturing/doctype/bom/bom.py
index c32a8a9..9da461f 100644
--- a/erpnext/manufacturing/doctype/bom/bom.py
+++ b/erpnext/manufacturing/doctype/bom/bom.py
@@ -713,7 +713,8 @@
 			"conversion_rate": 1, # Passed conversion rate as 1 purposefully, as conversion rate is applied at the end of the function
 			"conversion_factor": args.get("conversion_factor") or 1,
 			"plc_conversion_rate": 1,
-			"ignore_party": True
+			"ignore_party": True,
+			"ignore_conversion_rate": True
 		})
 		item_doc = frappe.get_cached_doc("Item", args.get("item_code"))
 		out = frappe._dict()
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index ca174a3..4657700 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -441,7 +441,7 @@
 
 	if item_tax_templates is None:
 		item_tax_templates = {}
-	
+
 	if item_rates is None:
 		item_rates = {}
 
@@ -807,10 +807,14 @@
 def validate_conversion_rate(args, meta):
 	from erpnext.controllers.accounts_controller import validate_conversion_rate
 
-	if (not args.conversion_rate
-		and args.currency==frappe.get_cached_value('Company',  args.company,  "default_currency")):
+	company_currency = frappe.get_cached_value('Company',  args.company,  "default_currency")
+	if (not args.conversion_rate and args.currency==company_currency):
 		args.conversion_rate = 1.0
 
+	if (not args.ignore_conversion_rate and args.conversion_rate == 1 and args.currency!=company_currency):
+		args.conversion_rate = get_exchange_rate(args.currency,
+			company_currency, args.transaction_date, "for_buying") or 1.0
+
 	# validate currency conversion rate
 	validate_conversion_rate(args.currency, args.conversion_rate,
 		meta.get_label("conversion_rate"), args.company)