diff --git a/actions/block.php b/actions/block.php
index 0efee5932c..441016d4e9 100644
--- a/actions/block.php
+++ b/actions/block.php
@@ -125,16 +125,18 @@ class BlockAction extends Action
     function areYouSureForm()
     {
         $id = $this->profile->id;
+        $this->elementStart('form', array('id' => 'block-' . $id,
+                                           'method' => 'post',
+                                           'class' => 'form_settings form_entity_block',
+                                           'action' => common_local_url('block')));
+        $this->elementStart('fieldset');
+        $this->hidden('token', common_session_token());
+        $this->element('legend', _('Block user'));
         $this->element('p', null,
                        _('Are you sure you want to block this user? '.
                          'Afterwards, they will be unsubscribed from you, '.
                          'unable to subscribe to you in the future, and '.
                          'you will not be notified of any @-replies from them.'));
-        $this->elementStart('form', array('id' => 'block-' . $id,
-                                           'method' => 'post',
-                                           'class' => 'block',
-                                           'action' => common_local_url('block')));
-        $this->hidden('token', common_session_token());
         $this->element('input', array('id' => 'blockto-' . $id,
                                       'name' => 'blockto',
                                       'type' => 'hidden',
@@ -144,8 +146,9 @@ class BlockAction extends Action
                 $this->hidden($k, $v);
             }
         }
-        $this->submit('no', _('No'));
-        $this->submit('yes', _('Yes'));
+        $this->submit('form_action-no', _('No'), 'submit form_action-primary', 'no', _("Do not block this user from this group"));
+        $this->submit('form_action-yes', _('Yes'), 'submit form_action-secondary', 'yes', _('Block this user from this group'));
+        $this->elementEnd('fieldset');
         $this->elementEnd('form');
     }
 
diff --git a/actions/groupblock.php b/actions/groupblock.php
index 93662da799..28685b1d56 100644
--- a/actions/groupblock.php
+++ b/actions/groupblock.php
@@ -151,17 +151,19 @@ class GroupblockAction extends Action
     function areYouSureForm()
     {
         $id = $this->profile->id;
+        $this->elementStart('form', array('id' => 'block-' . $id,
+                                           'method' => 'post',
+                                           'class' => 'form_settings form_entity_block',
+                                           'action' => common_local_url('groupblock')));
+        $this->elementStart('fieldset');
+        $this->hidden('token', common_session_token());
+        $this->element('legend', null, _('Block user'));
         $this->element('p', null,
                        sprintf(_('Are you sure you want to block user "%s" from the group "%s"? '.
                                  'They will be removed from the group, unable to post, and '.
                                  'unable to subscribe to the group in the future.'),
                                $this->profile->getBestName(),
                                $this->group->getBestName()));
-        $this->elementStart('form', array('id' => 'block-' . $id,
-                                           'method' => 'post',
-                                           'class' => 'block',
-                                           'action' => common_local_url('groupblock')));
-        $this->hidden('token', common_session_token());
         $this->hidden('blockto-' . $this->profile->id,
                       $this->profile->id,
                       'blockto');
@@ -173,8 +175,9 @@ class GroupblockAction extends Action
                 $this->hidden($k, $v);
             }
         }
-        $this->submit('no', _('No'));
-        $this->submit('yes', _('Yes'));
+        $this->submit('form_action-no', _('No'), 'submit form_action-primary', 'no', _("Do not block this user from this group"));
+        $this->submit('form_action-yes', _('Yes'), 'submit form_action-secondary', 'yes', _('Block this user from this group'));
+        $this->elementEnd('fieldset');
         $this->elementEnd('form');
     }
 
diff --git a/theme/base/css/display.css b/theme/base/css/display.css
index 49907058e3..403a9c37f4 100644
--- a/theme/base/css/display.css
+++ b/theme/base/css/display.css
@@ -154,7 +154,8 @@ font-weight:bold;
 #form_invite legend,
 #form_notice_delete legend,
 #form_password_recover legend,
-#form_password_change legend {
+#form_password_change legend,
+.form_entity_block legend {
 display:none;
 }