diff --git a/addons/stock/wizard/stock_return_picking.py b/addons/stock/wizard/stock_return_picking.py
index 112b233bf1f..deb624ea797 100644
--- a/addons/stock/wizard/stock_return_picking.py
+++ b/addons/stock/wizard/stock_return_picking.py
@@ -103,7 +103,7 @@ class stock_return_picking(osv.osv_memory):
         # Cancel assignment of existing chained assigned moves
         moves_to_unreserve = []
         for move in pick.move_lines:
-            to_check_moves = [move.move_dest_id]
+            to_check_moves = [move.move_dest_id] if move.move_dest_id.id else []
             while to_check_moves:
                 current_move = to_check_moves.pop()
                 if current_move.state not in ('done', 'cancel') and current_move.reserved_quant_ids: