diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index 0883d915ef5..d49138f89b9 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -1,4 +1,4 @@
--- ASDL's three builtin types are identifier, int, string
+-- ASDL's five builtin types are identifier, int, string, object, bool
 
 module Python
 {