diff --git a/concrete/bootstrap/process.php b/concrete/bootstrap/process.php
index <HASH>..<HASH> 100644
--- a/concrete/bootstrap/process.php
+++ b/concrete/bootstrap/process.php
@@ -66,7 +66,7 @@ if (isset($_REQUEST['ctask']) && $_REQUEST['ctask'] && $valt->validate()) {
         case 'publish-now':
             if ($cp->canApprovePageVersions()) {
                 $v = CollectionVersion::get($c, "SCHEDULED");
-                $v->approve(false);
+                $v->approve(false, null);
 
                 header('Location: ' . \Core::getApplicationURL() . '/' . DISPATCHER_FILENAME .
                     '?cID=' . $c->getCollectionID());
Delete publish date when the user click "Publish Now" button