diff --git a/stock/doctype/delivery_note/delivery_note.py b/stock/doctype/delivery_note/delivery_note.py
index 26b7f25..679d743 100644
--- a/stock/doctype/delivery_note/delivery_note.py
+++ b/stock/doctype/delivery_note/delivery_note.py
@@ -289,6 +289,9 @@
 				
 				if d['reserved_qty'] < 0 :
 					# Reduce reserved qty from reserved warehouse mentioned in so
+					if not d["reserved_warehouse"]:
+						webnotes.throw(_("Reserved Warehouse is missing in Sales Order"))
+						
 					args = {
 						"item_code": d['item_code'],
 						"voucher_type": self.doc.doctype,