diff --git a/erpnext/accounts/report/purchase_register/purchase_register.py b/erpnext/accounts/report/purchase_register/purchase_register.py
index 5d24096..e33b90d 100644
--- a/erpnext/accounts/report/purchase_register/purchase_register.py
+++ b/erpnext/accounts/report/purchase_register/purchase_register.py
@@ -193,7 +193,7 @@
 	pi_items = frappe.db.sql("""
 		select parent, purchase_order, purchase_receipt, po_detail, project
 		from `tabPurchase Invoice Item`
-		where parent in (%s) and (ifnull(purchase_order, '') != '' or ifnull(purchase_receipt, '') != '')
+		where parent in (%s)
 	""" % ', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
 
 	invoice_po_pr_map = {}