diff --git a/third_party/3/typed_ast/ast35.pyi b/third_party/3/typed_ast/ast35.pyi
index 71ac1bae386b..af2c463373dd 100644
--- a/third_party/3/typed_ast/ast35.pyi
+++ b/third_party/3/typed_ast/ast35.pyi
@@ -258,6 +258,12 @@ class Str(expr):
 class Bytes(expr):
     s = ...  # type: bytes
 
+class FormattedValue(expr):
+    value = ...  # type: expr
+
+class JoinedStr(expr):
+    values = ...  # type: typing.List[typing.Union[Str, FormattedValue]]
+
 class NameConstant(expr):
     value = ...  # type: Any