diff --git a/addons/purchase/purchase_view.xml b/addons/purchase/purchase_view.xml
index 6a7da530de9..0d4e6bacb61 100644
--- a/addons/purchase/purchase_view.xml
+++ b/addons/purchase/purchase_view.xml
@@ -149,7 +149,7 @@
                     <button name="button_draft" states="cancel" string="Set to Draft" type="object" />
                     <button name="button_cancel" states="draft,to approve,sent,purchase" string="Cancel" type="object" />
                     <button name="button_done" type="object" string="Set to Done" states="purchase"
-                        help="If a purchase order is done, you can not modify it manually anymore. But you will still be able to bill or receive."/>
+                        help="If a purchase order is done, you cannot modify it manually anymore. You will not be able to receive invoices anymore for this purchase order."/>
                     <field name="state" widget="statusbar" statusbar_visible="draft,sent,purchase,done" readonly="1" />
                 </header>
                 <sheet>
diff --git a/addons/sale/sale_view.xml b/addons/sale/sale_view.xml
index 8cd85068b3d..81ea3d344cb 100644
--- a/addons/sale/sale_view.xml
+++ b/addons/sale/sale_view.xml
@@ -144,7 +144,7 @@
                     <button name="action_cancel" states="draft,sent,sale" type="object" string="Cancel"/>
                     <button name="action_draft" states="cancel" type="object" string="Set to Quotation"/>
                     <button name="action_done" type="object" string="Set to Done" states="sale"
-                        help="If a sale order is done, you can not modify it manually anymore. But you will still be able to invoice or deliver."/>
+                        help="If a sale order is done, you cannot modify it manually anymore. However, you will still be able to invoice or deliver. This is used to freeze the sale order."/>
                     <field name="state" widget="statusbar" statusbar_visible="draft,sent,sale,done"/>
                 </header>
                 <sheet>