diff --git a/modoboa/templates/common/generic_field.html b/modoboa/templates/common/generic_field.html
index 938eac548..95a03f5cb 100644
--- a/modoboa/templates/common/generic_field.html
+++ b/modoboa/templates/common/generic_field.html
@@ -8,7 +8,7 @@
   {% if field.label %}
   <label class="control-label {{ label_width }}" for="id_{{ field.html_name }}">{{ field.label }}
     {% if help_display_mode == "tooltip" and field.help_text %}
-    <a href="#" class="help" data-original-title="{% trans 'Help:' %} {{ field.label }}" data-content="{{ field.help_text }}" rel="popover">?</a>
+    <a href="#" class="help" data-original-title="{% trans 'Help:' %} {{ field.label }}" data-content="{{ field.help_text }}" rel="popover" tabindex="-1">?</a>
     {% endif %}
   </label>
   {% endif %}
diff --git a/modoboa/templates/common/generic_fields_group.html b/modoboa/templates/common/generic_fields_group.html
index ab83b3fb2..1a37ebe80 100644
--- a/modoboa/templates/common/generic_fields_group.html
+++ b/modoboa/templates/common/generic_fields_group.html
@@ -5,7 +5,7 @@
     {% if forloop.first %}
       {{ label }}
       {% if help_text %}
-    <a href="#" class="help" data-original-title="{% trans 'Help:' %} {{ label }}" data-content="{{ help_text }}" rel="popover">?</a>
+    <a href="#" class="help" data-original-title="{% trans 'Help:' %} {{ label }}" data-content="{{ help_text }}" rel="popover" tabindex="-1">?</a>
       {% endif %}
     {% endif %}
   </label>