diff --git a/stdlib/3/__future__.pyi b/stdlib/3/__future__.pyi
index 241406974756..f59753cd8067 100644
--- a/stdlib/3/__future__.pyi
+++ b/stdlib/3/__future__.pyi
@@ -1,8 +1,8 @@
-from sys import _version_info
+import sys
 
 class _Feature:
-    def getOptionalRelease(self) -> _version_info: ...
-    def getMandatoryRelease(self) -> _version_info: ...
+    def getOptionalRelease(self) -> sys._version_info: ...
+    def getMandatoryRelease(self) -> sys._version_info: ...
 
 absolute_import = ...  # type: _Feature
 division = ...  # type: _Feature
@@ -11,3 +11,6 @@ nested_scopes = ...  # type: _Feature
 print_function = ...  # type: _Feature
 unicode_literals = ...  # type: _Feature
 with_statement = ...  # type: _Feature
+
+if sys.version_info[:2] >= (3, 5):
+    generator_stop = ...  # type: _Feature