diff --git a/libraries/src/Application/WebApplication.php b/libraries/src/Application/WebApplication.php
index bbe24c82d2d5..d276f17ec31b 100644
--- a/libraries/src/Application/WebApplication.php
+++ b/libraries/src/Application/WebApplication.php
@@ -256,7 +256,7 @@ protected function render()
     /**
      * Method to get the application document object.
      *
-     * @return  Document  The document object
+     * @return  ?Document  The document object
      *
      * @since   1.7.3
      */
@@ -268,7 +268,7 @@ public function getDocument()
     /**
      * Method to get the application language object.
      *
-     * @return  Language  The language object
+     * @return  ?Language  The language object
      *
      * @since   1.7.3
      */