diff --git a/addons/website/static/src/systray_items/new_content.js b/addons/website/static/src/systray_items/new_content.js
index efebce9df6b..dd0066e8665 100644
--- a/addons/website/static/src/systray_items/new_content.js
+++ b/addons/website/static/src/systray_items/new_content.js
@@ -170,10 +170,14 @@ export class NewContentModal extends Component {
         if (redirectUrl) {
             window.location.replace(redirectUrl);
         } else {
-            const { id, metadata: { path } } = this.website.currentWebsite;
+            const { id, metadata: { path, viewXmlid } } = this.website.currentWebsite;
+            const url = new URL(path);
+            if (viewXmlid === 'website.page_404') {
+                url.pathname = '';
+            }
             // A reload is needed after installing a new module, to instantiate
             // a NewContentModal with patches from the installed module.
-            window.location.replace(`/web#action=website.website_preview&website_id=${id}&path=${encodeURIComponent(path)}&display_new_content=true`);
+            window.location.replace(`/web#action=website.website_preview&website_id=${id}&path=${encodeURIComponent(url.toString())}&display_new_content=true`);
         }
     }