diff --git a/include/class.forms.php b/include/class.forms.php
index 8892b2592239e4a8b49fe8df88321bbc1716deec..7e9b9409efd14f3b0e9591d25e210b2bf21a741f 100644
--- a/include/class.forms.php
+++ b/include/class.forms.php
@@ -1849,7 +1849,7 @@ class ChoicesWidget extends Widget {
          ?>
         <script type="text/javascript">
         $(function() {
-            $("#<?php echo $this->name; ?>")
+            $("#<?php echo $this->id; ?>")
             .multiselect({'noneSelectedText':'<?php echo $prompt; ?>'});
         });
         </script>