diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index ee6e999..54f5893 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -58,6 +58,8 @@
 	     | Dict(expr* keys, expr* values)
 	     | Set(expr* elts)
 	     | ListComp(expr elt, comprehension* generators)
+	     | SetComp(expr elt, comprehension* generators)
+	     | DictComp(expr key, expr value, comprehension* generators)
 	     | GeneratorExp(expr elt, comprehension* generators)
 	     -- the grammar constrains where yield expressions can occur
 	     | Yield(expr? value)