diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index 789e07b..a535f65 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -36,7 +36,7 @@
 	      | Assert(expr test, expr? msg)
 
 	      | Import(alias* names)
-	      | ImportFrom(identifier module, alias* names, int? level)
+	      | ImportFrom(identifier? module, alias* names, int? level)
 
 	      | Global(identifier* names)
 	      | Nonlocal(identifier* names)