diff --git a/erpnext/patches/mar_2012/so_rv_mapper_fix.py b/erpnext/patches/mar_2012/so_rv_mapper_fix.py
new file mode 100644
index 00000000000..9e7fc998d9e
--- /dev/null
+++ b/erpnext/patches/mar_2012/so_rv_mapper_fix.py
@@ -0,0 +1,7 @@
+def execute():
+	import webnotes
+	webnotes.conn.sql("""DELETE FROM `tabTable Mapper Detail`
+		WHERE parent='Sales Order-Receivable Voucher'
+		AND from_table='Sales Order Detail'""")
+	from webnotes.modules.module_manager import reload_doc
+	reload_doc('accounts', 'DocType Mapper', 'Sales Order-Receivable Voucher')