diff --git a/stdlib/3/ast.pyi b/stdlib/3/ast.pyi
index 7d58a80fd..8cb78fbf5 100644
--- a/stdlib/3/ast.pyi
+++ b/stdlib/3/ast.pyi
@@ -31,6 +31,7 @@ if sys.version_info >= (3, 8):
         source: Union[str, bytes],
         filename: Union[str, bytes] = ...,
         mode: Literal["exec"] = ...,
+        *,
         type_comments: bool = ...,
         feature_version: Union[None, int, _typing.Tuple[int, int]] = ...,
     ) -> Module: ...
@@ -39,6 +40,7 @@ if sys.version_info >= (3, 8):
         source: Union[str, bytes],
         filename: Union[str, bytes] = ...,
         mode: str = ...,
+        *,
         type_comments: bool = ...,
         feature_version: Union[None, int, _typing.Tuple[int, int]] = ...,
     ) -> AST: ...
@@ -60,5 +62,6 @@ def increment_lineno(node: _T, n: int = ...) -> _T: ...
 def iter_child_nodes(node: AST) -> Iterator[AST]: ...
 def iter_fields(node: AST) -> Iterator[_typing.Tuple[str, Any]]: ...
 def literal_eval(node_or_string: Union[str, AST]) -> Any: ...
-def get_source_segment(source: str, node: AST, *, padded: bool = ...) -> Optional[str]: ...
+if sys.version_info >= (3, 8):
+    def get_source_segment(source: str, node: AST, *, padded: bool = ...) -> Optional[str]: ...
 def walk(node: AST) -> Iterator[AST]: ...