diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index 108dbe065..1db78c72f 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -1385,13 +1385,13 @@ def sorted(__iterable: Iterable[_T], *, key: Callable[[_T], SupportsLessThan], r
 
 if sys.version_info >= (3, 8):
     @overload
-    def sum(__iterable: Iterable[_T]) -> _T | int: ...
+    def sum(__iterable: Iterable[_T]) -> _T | Literal[0]: ...
     @overload
     def sum(__iterable: Iterable[_T], start: _S) -> _T | _S: ...
 
 else:
     @overload
-    def sum(__iterable: Iterable[_T]) -> _T | int: ...
+    def sum(__iterable: Iterable[_T]) -> _T | Literal[0]: ...
     @overload
     def sum(__iterable: Iterable[_T], __start: _S) -> _T | _S: ...