diff --git a/erpnext/patches/jan_mar_2012/remove_series_defval.py b/erpnext/patches/jan_mar_2012/remove_series_defval.py
new file mode 100644
index 0000000..123cc41
--- /dev/null
+++ b/erpnext/patches/jan_mar_2012/remove_series_defval.py
@@ -0,0 +1,3 @@
+def execute():
+	import webnotes
+	webnotes.conn.sql("update `tabDocField` set `default`='' where parent = 'Receivable Voucher' and fieldname = 'naming_series' and `default` = 'INV'")
diff --git a/erpnext/patches/patch_list.py b/erpnext/patches/patch_list.py
index 7750962..85a11a5 100644
--- a/erpnext/patches/patch_list.py
+++ b/erpnext/patches/patch_list.py
@@ -177,5 +177,10 @@
 		'patch_file': 'reload_table',
 		'description': 'Relaod all item table: fld order changes' 
 	},
+	{
+		'patch_module': 'patches.jan_mar_2012',
+		'patch_file': 'remove_series_defval',
+		'description': 'Remove rv series default value' 
+	},
 
 ]