diff --git a/question/preview.php b/question/preview.php
index 05a2f82bde2..ffd5b24f2d7 100644
--- a/question/preview.php
+++ b/question/preview.php
@@ -192,7 +192,7 @@
         echo "</p>\n";
     }
     $number = 1;
-    echo '<form method="post" action="preview.php" enctype="multipart/form-data">', "\n";
+    echo '<form method="post" action="preview.php" enctype="multipart/form-data" id="responseform">', "\n";
     print_question($questions[$id], $curstate, $number, $quiz, $options);
     echo '<br />';