diff --git a/inhalte/turnus_edit.php b/inhalte/turnus_edit.php
index f26aee8..ca99a51 100644
--- a/inhalte/turnus_edit.php
+++ b/inhalte/turnus_edit.php
@@ -56,6 +56,7 @@ if ("settings" == $_POST['action'])
 {
 	if ($temp)
 	{
+        if (!isset($_POST['KfZ_ID'])) { $_POST['KfZ_ID'] = null; }
 		$sql = 'UPDATE ' . PREFIX . '_Reminder SET
 					Kontakt_ID		= "' . $_POST['Kontakt_ID'] . '",
 					Admin_ID		= "' . $_POST['Admin_ID'] . '",