diff --git a/addons/mass_mailing/views/snippets_themes_options.xml b/addons/mass_mailing/views/snippets_themes_options.xml
index dd8cdee5a9e..5e5055a60b2 100644
--- a/addons/mass_mailing/views/snippets_themes_options.xml
+++ b/addons/mass_mailing/views/snippets_themes_options.xml
@@ -39,6 +39,7 @@
     <div data-js="sizing_y"
         data-selector="[data-oe-field='body_html'] > div:not(.o_layout), [data-oe-field='body_html'] .oe_structure > div, th"
         data-exclude=".o_mail_no_resize, .o_mail_wrapper_td">
+    </div>
 
     <div data-js="colorpicker"
         data-selector="