diff --git a/framework/i18n/MessageFormatter.php b/framework/i18n/MessageFormatter.php
index 5163312704..5df9247ca8 100644
--- a/framework/i18n/MessageFormatter.php
+++ b/framework/i18n/MessageFormatter.php
@@ -204,7 +204,7 @@ class MessageFormatter extends Component
      * @param array $givenParams The array of values to insert into the format string.
      * @param array $resultingParams Modified array of parameters.
      * @param array $map
-     * @return string The pattern string with placeholders replaced.
+     * @return string|false The pattern string with placeholders replaced.
      */
     private function replaceNamedArguments($pattern, $givenParams, &$resultingParams = [], &$map = [])
     {
diff --git a/framework/web/UploadedFile.php b/framework/web/UploadedFile.php
index 7e5f82459b..9cfe95b907 100644
--- a/framework/web/UploadedFile.php
+++ b/framework/web/UploadedFile.php
@@ -69,7 +69,7 @@ class UploadedFile extends BaseObject
      */
     private $_tempResource;
     /**
-     * @var array[]
+     * @var array[]|null
      */
     private static $_files;