diff --git a/plugins/Realtime/RealtimePlugin.php b/plugins/Realtime/RealtimePlugin.php
index b737e442a0..cbfa6bae00 100644
--- a/plugins/Realtime/RealtimePlugin.php
+++ b/plugins/Realtime/RealtimePlugin.php
@@ -220,8 +220,9 @@ class RealtimePlugin extends Plugin
 
         $action->elementStart('body',
                               (common_current_user()) ? array('id' => $action->trimmed('action'),
-                                                              'class' => 'user_in')
-                              : array('id' => $action->trimmed('action')));
+                                                              'class' => 'user_in realtime-popup')
+                              : array('id' => $action->trimmed('action'),
+                                      'class'=> 'realtime-popup'));
 
         // XXX hack to deal with JS that tries to get the
         // root url from page output