diff --git a/ext/standard/basic_functions.stub.php b/ext/standard/basic_functions.stub.php
index d6ab6d2b0763b..f7889370cbc9a 100755
--- a/ext/standard/basic_functions.stub.php
+++ b/ext/standard/basic_functions.stub.php
@@ -683,20 +683,20 @@ function headers_list(): array {}
 /* {{{ html.c */
 
 /** @refcount 1 */
-function htmlspecialchars(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE, ?string $encoding = null, bool $double_encode = true): string {}
+function htmlspecialchars(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, ?string $encoding = null, bool $double_encode = true): string {}
 
-function htmlspecialchars_decode(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE): string {}
+function htmlspecialchars_decode(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401): string {}
 
-function html_entity_decode(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE, ?string $encoding = null): string {}
+function html_entity_decode(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, ?string $encoding = null): string {}
 
 /** @refcount 1 */
-function htmlentities(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE, ?string $encoding = null, bool $double_encode = true): string {}
+function htmlentities(string $string, int $flags = ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, ?string $encoding = null, bool $double_encode = true): string {}
 
 /**
  * @return array<string, string>
  * @refcount 1
  */
-function get_html_translation_table(int $table = HTML_SPECIALCHARS, int $flags = ENT_QUOTES | ENT_SUBSTITUTE, string $encoding = "UTF-8"): array {}
+function get_html_translation_table(int $table = HTML_SPECIALCHARS, int $flags = ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, string $encoding = "UTF-8"): array {}
 
 /* }}} */