diff --git a/TODO b/TODO
index 2a0a2ccd77..2a7fafbf54 100644
--- a/TODO
+++ b/TODO
@@ -2,3 +2,4 @@
 - Add button to recreate invoice when in exception
 - Add form_relate from party to party's purchase
 - Add historization of quotation
+- Allow to customize purchase.product_supplier to handle delivery_time depending of quantity