diff --git a/src/Mailer/Mailer.php b/src/Mailer/Mailer.php
index d151e72fac7..1b88471859c 100644
--- a/src/Mailer/Mailer.php
+++ b/src/Mailer/Mailer.php
@@ -149,6 +149,11 @@ public function layout($layout)
         return $this;
     }
 
+    /**
+     * Get Email instance's view builder.
+     *
+     * @return \Cake\View\ViewBuilder
+     */
     public function viewBuilder()
     {
         return $this->_email->viewBuilder();