diff --git a/code/controllers/CMSMain.php b/code/controllers/CMSMain.php
index 81daa639..be0097e4 100644
--- a/code/controllers/CMSMain.php
+++ b/code/controllers/CMSMain.php
@@ -607,7 +607,7 @@ class CMSMain extends LeftAndMain implements CurrentPageIdentifier, PermissionPr
 			$form->addExtraClass('cms-edit-form');
 			$form->setTemplate($this->getTemplatesWithSuffix('_EditForm'));
 			// TODO Can't merge $FormAttributes in template at the moment
-			$form->addExtraClass('center ss-tabset ' . $this->BaseCSSClasses());
+			$form->addExtraClass('center ' . $this->BaseCSSClasses());
 			// if($form->Fields()->hasTabset()) $form->Fields()->findOrMakeTab('Root')->setTemplate('CMSTabSet');
 			$form->setAttribute('data-pjax-fragment', 'CurrentForm');