diff --git a/addons/website_mass_mailing/views/snippets_templates.xml b/addons/website_mass_mailing/views/snippets_templates.xml
index f0fee84ad53..7bc1c4ac2d6 100644
--- a/addons/website_mass_mailing/views/snippets_templates.xml
+++ b/addons/website_mass_mailing/views/snippets_templates.xml
@@ -3,6 +3,8 @@
 <template id="iframe_css_assets_edit" name="CSS assets for wysiwyg iframe content for popup">
     <t t-call-assets="web.assets_common" t-js="false"/>
     <t t-call-assets="web.assets_frontend" t-js="false"/>
+    <t t-call-assets="web_editor.assets_wysiwyg" t-js="false"/>
+    <t t-call-assets="website.assets_editor" t-js="false"/>
     <link rel="stylesheet" href="/website_mass_mailing/static/src/css/website_mass_mailing_popup.css" type="text/css"/>
 </template>