diff --git a/erpnext/controllers/stock_controller.py b/erpnext/controllers/stock_controller.py
index e0031c9..11ac703 100644
--- a/erpnext/controllers/stock_controller.py
+++ b/erpnext/controllers/stock_controller.py
@@ -406,7 +406,8 @@
 	def set_rate_of_stock_uom(self):
 		if self.doctype in ["Purchase Receipt", "Purchase Invoice", "Purchase Order", "Sales Invoice", "Sales Order", "Delivery Note", "Quotation"]:
 			for d in self.get("items"):
-				d.stock_uom_rate = d.rate / d.conversion_factor
+				if d.conversion_factor:
+					d.stock_uom_rate = d.rate / d.conversion_factor
 
 	def validate_internal_transfer(self):
 		if self.doctype in ('Sales Invoice', 'Delivery Note', 'Purchase Invoice', 'Purchase Receipt') \