diff --git a/lib/zin/wg/formpanel/v1.php b/lib/zin/wg/formpanel/v1.php
index 39d129d4bf..6b1f28ae08 100644
--- a/lib/zin/wg/formpanel/v1.php
+++ b/lib/zin/wg/formpanel/v1.php
@@ -98,9 +98,9 @@ class formPanel extends panel
      * Build form widget by mode.
      *
      * @access protected
-     * @return void
+     * @return wg
      */
-    protected function buildForm()
+    protected function buildForm(): wg
     {
         $customFields = $this->prop('customFields');
         $hiddenFields = array();