diff --git a/cgi-bin/uebung08/list-words.php b/cgi-bin/uebung08/list-words.php
index 974e77e..7def50c 100644
--- a/cgi-bin/uebung08/list-words.php
+++ b/cgi-bin/uebung08/list-words.php
@@ -16,7 +16,7 @@ END;
 
 foreach ((array)$arr as $a) {
     $transformed = transformWord($a);
-    $mask = maskWord($a);
+    $mask = implode(" ", maskWord($a));
 echo <<<END
 <tr>
     <td>$a</td>