diff --git a/include/class.forms.php b/include/class.forms.php
index 13d2c42a54680013edb5fe654442bf25b65fe1fe..0ebf717d835c6f211a230fcc4530e2be5aeac6ba 100644
--- a/include/class.forms.php
+++ b/include/class.forms.php
@@ -2156,7 +2156,7 @@ class VisibilityConstraint {
         $expression = $this->compileQ($this->constraint, $form);
 ?>
           if (<?php echo $expression; ?>)
-            target.slideDown('slow', function (){
+            target.slideDown('fast', function (){
                 $(this).trigger('show');
                 });
           else