diff --git a/resources/functionMap.php b/resources/functionMap.php
index 03ffaa21fa..8c0f003787 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -3957,8 +3957,8 @@
 'HRTime\StopWatch::start' => ['void'],
 'HRTime\StopWatch::stop' => ['void'],
 'html_entity_decode' => ['string', 'string'=>'string', 'quote_style='=>'int', 'encoding='=>'string'],
-'htmlentities' => ['string', 'string'=>'string', 'quote_style='=>'int', 'encoding='=>'string', 'double_encode='=>'bool'],
-'htmlspecialchars' => ['string', 'string'=>'string', 'quote_style='=>'int', 'encoding='=>'string', 'double_encode='=>'bool'],
+'htmlentities' => ['string', 'string'=>'string', 'quote_style='=>'int', 'encoding='=>'string|null', 'double_encode='=>'bool'],
+'htmlspecialchars' => ['string', 'string'=>'string', 'quote_style='=>'int', 'encoding='=>'string|null', 'double_encode='=>'bool'],
 'htmlspecialchars_decode' => ['string', 'string'=>'string', 'quote_style='=>'int'],
 'http\Env\Request::__construct' => ['void'],
 'http\Env\Request::getCookie' => ['mixed', 'name='=>'string', 'type='=>'mixed', 'defval='=>'mixed', 'delete='=>'bool|false'],