diff --git a/addons/stock/wizard/stock_return_picking.py b/addons/stock/wizard/stock_return_picking.py
index cf4a3b5765c..e85345a65ea 100644
--- a/addons/stock/wizard/stock_return_picking.py
+++ b/addons/stock/wizard/stock_return_picking.py
@@ -169,6 +169,8 @@ class stock_return_picking(osv.osv_memory):
         else:
             new_type = 'internal'
         seq_obj_name = 'stock.picking.' + new_type
+        if new_type == 'internal': 
+            seq_obj_name = 'stock.picking'
         new_pick_name = self.pool.get('ir.sequence').get(cr, uid, seq_obj_name)
         new_picking = pick_obj.copy(cr, uid, pick.id, {
                                         'name': _('%s-%s-return') % (new_pick_name, pick.name),