diff --git a/stdlib/2.7/ast.pyi b/stdlib/2.7/ast.pyi
index ec22e81a7..dbaf6afe6 100644
--- a/stdlib/2.7/ast.pyi
+++ b/stdlib/2.7/ast.pyi
@@ -27,7 +27,7 @@ def increment_lineno(node, *args, **kwargs) -> Any: ...
 def iter_child_nodes(node) -> Generator[Any, Any, Any]: ...
 def iter_fields(node) -> Any: ...  # TODO: Generator[Tuple[Any, ...]]: ...
 def literal_eval(node_or_string) -> Any: ...
-def parse(source, filename, mode, *args, **kwargs) -> Any: ...
+def parse(source, filename = ..., mode = ..., *args, **kwargs) -> AST: ...
 def walk(node) -> Any: ...  # TODO: Generator[Any]: ...
 
 class NodeVisitor(object):