Index: class-wp-users-list-table.php
===================================================================
--- class-wp-users-list-table.php	(revision 25990)
+++ class-wp-users-list-table.php	(working copy)
@@ -180,6 +180,7 @@
 			'username' => 'login',
 			'name'     => 'name',
 			'email'    => 'email',
+			'role'	   => 'role',
 		);
 
 		if ( $this->is_site_users )