diff --git a/lib/action.php b/lib/action.php
index 233ac78567..fce59ba8a0 100644
--- a/lib/action.php
+++ b/lib/action.php
@@ -681,6 +681,9 @@ class Action extends HTMLOutputter // lawsuit
     function showCore()
     {
         $this->elementStart('div', array('id' => 'core'));
+        $this->elementStart('div', array('id' => 'aside_primary_wrapper'));
+        $this->elementStart('div', array('id' => 'content_wrapper'));
+        $this->elementStart('div', array('id' => 'site_nav_local_views_wrapper'));
         if (Event::handle('StartShowLocalNavBlock', array($this))) {
             $this->showLocalNavBlock();
             Event::handle('EndShowLocalNavBlock', array($this));
@@ -694,6 +697,9 @@ class Action extends HTMLOutputter // lawsuit
             Event::handle('EndShowAside', array($this));
         }
         $this->elementEnd('div');
+        $this->elementEnd('div');
+        $this->elementEnd('div');
+        $this->elementEnd('div');
     }
 
     /**