diff --git a/addons/web/static/src/xml/base.xml b/addons/web/static/src/xml/base.xml
index 3d979186aa3..f4c5de237ac 100644
--- a/addons/web/static/src/xml/base.xml
+++ b/addons/web/static/src/xml/base.xml
@@ -554,7 +554,7 @@
                         <a class="oe_sidebar_action_a" t-att-title="item.title" t-att-data-section="section.name" t-att-data-index="item_index" t-att-href="item.url" target="_blank">
                             <t t-raw="item.label"/>
                         </a>
-                        <a t-if="section.name == 'files'" class="oe_sidebar_delete_item" t-att-data-id="item.id" title="Delete this attachment">x</a>
+                         <a t-if="section.name == 'files' and !item.deletable" class="oe_sidebar_delete_item" t-att-data-id="item.id" title="Delete this attachment">x</a>
                     </li>
                     <li t-if="section.name == 'files'" class="oe_sidebar_add_attachment">
                         <t t-call="HiddenInputFile">