diff --git a/libraries/classes/Sql.php b/libraries/classes/Sql.php
index a09f659817..f48c85f45b 100644
--- a/libraries/classes/Sql.php
+++ b/libraries/classes/Sql.php
@@ -763,7 +763,7 @@ EOT;
         $retval = $pmatable->setUiProp(
             $property_to_set,
             $property_value,
-            $_POST['table_create_time']
+            isset($_POST['table_create_time']) ? $_POST['table_create_time'] : null
         );
         if (gettype($retval) != 'boolean') {
             $response = Response::getInstance();