diff --git a/stdlib/json/scanner.pyi b/stdlib/json/scanner.pyi
index f3b98996b..68b42e92d 100644
--- a/stdlib/json/scanner.pyi
+++ b/stdlib/json/scanner.pyi
@@ -1,3 +1,7 @@
 from _json import make_scanner as make_scanner
+from re import Pattern
+from typing import Final
 
 __all__ = ["make_scanner"]
+
+NUMBER_RE: Final[Pattern[str]]  # undocumented