diff --git a/addons/mass_mailing/models/mass_mailing.py b/addons/mass_mailing/models/mass_mailing.py
index 2295874d2b8..2f51c30bafb 100644
--- a/addons/mass_mailing/models/mass_mailing.py
+++ b/addons/mass_mailing/models/mass_mailing.py
@@ -53,8 +53,8 @@ class MassMailingList(osv.Model):
     }
 
     def _get_default_popup_content(self, cr, uid, context=None):
-        return """<div class="o_popup_modal_header text-center">
-    <h3 class="o_popup_modal_title mt8">Odoo Presents</h3>
+        return """<div class="modal-header text-center">
+    <h3 class="modal-title mt8">Odoo Presents</h3>
 </div>
 <div class="o_popup_message">
     <font>7</font>
diff --git a/addons/mass_mailing/views/snippets.xml b/addons/mass_mailing/views/snippets.xml
index fa1982a20d6..93ddd4393ad 100644
--- a/addons/mass_mailing/views/snippets.xml
+++ b/addons/mass_mailing/views/snippets.xml
@@ -94,8 +94,8 @@
                                 <div class="o_editable" t-att-data-oe-model="model" t-att-data-oe-field="field" t-att-data-oe-id="res_id" data-oe-type="html">
                                     <!-- Can be removed once default values are ok for the editor -->
                                     <t t-raw="content">
-                                        <div class="o_popup_modal_header text-center">
-                                            <h3 class="o_popup_modal_title mt8">Odoo Presents</h3>
+                                        <div class="modal-header text-center">
+                                            <h3 class="modal-title mt8">Odoo Presents</h3>
                                         </div>
                                         <div class="o_popup_message">
                                             <font>7</font>