diff --git a/library/HTMLPurifier/Strategy/ValidateAttributes.php b/library/HTMLPurifier/Strategy/ValidateAttributes.php
index c9d0ef7c..f5bc00e6 100644
--- a/library/HTMLPurifier/Strategy/ValidateAttributes.php
+++ b/library/HTMLPurifier/Strategy/ValidateAttributes.php
@@ -41,6 +41,8 @@ class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
             
             // note that we have no facilities here for removing tokens
             $validator->validateToken($token, $config, $context);
+            
+            $tokens[$key] = $token; // for PHP 4
         }
         
         $context->destroy('IDAccumulator');