diff --git a/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php b/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php
index f314ced..e28a456 100644
--- a/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php
+++ b/htmlpurifier/library/HTMLPurifier/HTMLModule/Tables.php
@@ -37,6 +37,7 @@ class HTMLPurifier_HTMLModule_Tables extends HTMLPurifier_HTMLModule
                 'abbr'    => 'Text',
                 'colspan' => 'Number',
                 'rowspan' => 'Number',
+                'scope'   => 'Text',
             ),
             $cell_align
         );