diff --git a/vm/src/stdlib/ast.rs b/vm/src/stdlib/ast.rs
index 8a1acd0f5d..ee56d7a850 100644
--- a/vm/src/stdlib/ast.rs
+++ b/vm/src/stdlib/ast.rs
@@ -42,7 +42,7 @@ fn get_node_field_opt(
 #[derive(Debug, PyValue)]
 pub(crate) struct AstNode;
 
-#[pyimpl(flags(HAS_DICT))]
+#[pyimpl(flags(BASETYPE, HAS_DICT))]
 impl AstNode {
     #[pymethod(magic)]
     fn init(zelf: PyObjectRef, args: FuncArgs, vm: &VirtualMachine) -> PyResult<()> {