diff --git a/erpnext/patches/april_2012/remove_default_from_rv_detail.py b/erpnext/patches/april_2012/remove_default_from_rv_detail.py
new file mode 100644
index 0000000..cf81f6d
--- /dev/null
+++ b/erpnext/patches/april_2012/remove_default_from_rv_detail.py
@@ -0,0 +1,3 @@
+def execute():
+	import webnotes
+	webnotes.conn.sql("update `tabDocField` set `default` = '' where fieldname = 'cost_center' and parent = 'RV Detail' and `default` = 'Purchase - TC'")