diff --git a/cgi-bin/uebung08/list-words.php b/cgi-bin/uebung08/list-words.php
index 4a0654c..974e77e 100644
--- a/cgi-bin/uebung08/list-words.php
+++ b/cgi-bin/uebung08/list-words.php
@@ -14,7 +14,7 @@ echo <<<END
   </tr>
 END;
 
-foreach ($arr as $a) {
+foreach ((array)$arr as $a) {
     $transformed = transformWord($a);
     $mask = maskWord($a);
 echo <<<END