diff --git a/addons/mass_mailing/static/src/js/mass_mailing_html_field.js b/addons/mass_mailing/static/src/js/mass_mailing_html_field.js
index 49015f1d3e9..6f4a4e60294 100644
--- a/addons/mass_mailing/static/src/js/mass_mailing_html_field.js
+++ b/addons/mass_mailing/static/src/js/mass_mailing_html_field.js
@@ -210,7 +210,7 @@ export class MassMailingHtmlField extends HtmlField {
 
         if (device.isMobile) {
             $snippetsSideBar.hide();
-            this.$content.attr('style', 'padding-left: 0px !important');
+            this.wysiwyg.$iframe.attr('style', 'padding-left: 0px !important');
         }
 
         if (!odoo.debug) {