diff --git a/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php b/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
index c4f16a4d..700a25db 100644
--- a/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
+++ b/library/HTMLPurifier/HTMLModule/Tidy/XHTMLAndHTML4.php
@@ -96,6 +96,7 @@ class HTMLPurifier_HTMLModule_Tidy_XHTMLAndHTML4 extends HTMLPurifier_HTMLModule
 
         // @bgcolor for table, tr, td, th ---------------------------------
         $r['table@bgcolor'] =
+        $r['tr@bgcolor'] =
         $r['td@bgcolor'] =
         $r['th@bgcolor'] =
             new HTMLPurifier_AttrTransform_BgColor();