diff --git a/stdlib/html/__init__.pyi b/stdlib/html/__init__.pyi
index 8ad72f126588..71e971d15044 100644
--- a/stdlib/html/__init__.pyi
+++ b/stdlib/html/__init__.pyi
@@ -1,4 +1,7 @@
+import re
+
 __all__ = ["escape", "unescape"]
 
 def escape(s: str, quote: bool = True) -> str: ...
 def unescape(s: str) -> str: ...
+def _replace_charref(s: re.Match[str]) -> str: ...