diff --git a/patches/patch_list.py b/patches/patch_list.py
index 7041ba8..6d1a084 100644
--- a/patches/patch_list.py
+++ b/patches/patch_list.py
@@ -218,4 +218,5 @@
 	"execute:webnotes.bean('Style Settings').save() #2013-09-19",
 	"execute:webnotes.conn.set_value('Accounts Settings', None, 'frozen_accounts_modifier', 'Accounts Manager') # 2013-09-24",
 	"patches.september_2013.p04_unsubmit_serial_nos",
+	"patches.september_2013.p05_fix_customer_in_pos",
 ]
\ No newline at end of file
diff --git a/patches/september_2013/p05_fix_customer_in_pos.py b/patches/september_2013/p05_fix_customer_in_pos.py
new file mode 100644
index 0000000..60210da
--- /dev/null
+++ b/patches/september_2013/p05_fix_customer_in_pos.py
@@ -0,0 +1,22 @@
+# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd.
+# License: GNU General Public License v3. See license.txt
+
+from __future__ import unicode_literals
+import webnotes
+def execute():
+	si_list = webnotes.conn.sql("""select name, debit_to from `tabSales Invoice` 
+		where ifnull(is_pos, 1)=1 and docstatus=1 and modified > '2013-09-03'""", as_dict=1)
+		
+	for si in si_list:
+		if not webnotes.conn.get_value("GL Entry", {"voucher_type": "Sales Invoice", 
+			"voucher_no": si.name, "account": si.debit_to}):
+				debit_to = webnotes.conn.sql("""select account from `tabGL Entry` gle
+					where voucher_type='Sales Invoice' and voucher_no=%s 
+					and (select master_type from tabAccount where name=gle.account)='Customer'
+				""", si.name)
+				if debit_to:
+					si_bean = webnotes.bean("Sales Invoice", si.name)
+					si_bean.doc.debit_to = debit_to[0][0]
+					si_bean.doc.customer = None
+					si_bean.run_method("set_customer_defaults")
+					si_bean.update_after_submit()
\ No newline at end of file