diff --git a/modoboa/templates/common/generic_modal.html b/modoboa/templates/common/generic_modal.html
index 3ff250b34..3d99814b9 100644
--- a/modoboa/templates/common/generic_modal.html
+++ b/modoboa/templates/common/generic_modal.html
@@ -4,7 +4,7 @@
     <div class="modal-content">
         <div class="modal-header">
           <a class="close btn btn-default" data-dismiss="modal">x</a>
-          <h3>{{ title }}</h3>
+          <h3 class="modal-title">{{ title }}</h3>
         </div>
         <div class="modal-body">
           {% block modalbody %}{% endblock %}