diff --git a/src/applications/project/controller/PhabricatorProjectMoveController.php b/src/applications/project/controller/PhabricatorProjectMoveController.php
--- a/src/applications/project/controller/PhabricatorProjectMoveController.php
+++ b/src/applications/project/controller/PhabricatorProjectMoveController.php
@@ -26,7 +26,7 @@
 
     $edit_header = null;
     $raw_header = $request->getStr('header');
-    if (strlen($raw_header)) {
+    if (phutil_nonempty_string($raw_header)) {
       $edit_header = phutil_json_decode($raw_header);
     } else {
       $edit_header = array();