diff --git a/date_elements.inc b/date_elements.inc
index 4303d13..b1084fa 100644
--- a/date_elements.inc
+++ b/date_elements.inc
@@ -379,8 +379,8 @@ function date_combo_element_process($element, &$form_state, $form) {
     $element['#fieldset_description'] = $description;
     if ($field['settings']['todate'] == 'optional') {
       $element[$to_field]['#states'] = array(
-        'visible' => array(
-          'input[name="' . $show_id . '"]' => array('checked' => TRUE),
+        'invisible' => array(
+          'input[name="' . $show_id . '"]' => array('checked' => FALSE),
       ));
     }
   }