diff --git a/module/project/ui/close.html.php b/module/project/ui/close.html.php
index a6e6f27dc1..bac2aa3438 100644
--- a/module/project/ui/close.html.php
+++ b/module/project/ui/close.html.php
@@ -14,7 +14,7 @@ modalHeader();
 formPanel
 (
     set::formID("zin_project_close_{$project->id}_form"),
-    set::ajax(array('beforeSubmit' => jsRaw("() => zui.Modal.confirm('{$confirmTip}')"))),
+    !empty($confirmTip) ? set::ajax(array('beforeSubmit' => jsRaw("() => zui.Modal.confirm('{$confirmTip}')"))) : null,
     formGroup
     (
         set::width('1/2'),