diff --git a/third_party/2and3/jinja2/environment.pyi b/third_party/2and3/jinja2/environment.pyi
index 3a6fa7d31..a1826d914 100644
--- a/third_party/2and3/jinja2/environment.pyi
+++ b/third_party/2and3/jinja2/environment.pyi
@@ -118,9 +118,9 @@ class Environment:
 
     # Frequently added extensions are included here:
     # from InternationalizationExtension:
-    def install_gettext_translations(self, translations: Any, newstyle: Optional[bool]): ...
-    def install_null_translations(self, newstyle: Optional[bool]): ...
-    def install_gettext_callables(self, gettext: Callable[..., Any], ngettext: Callable[..., Any], newstyle: Optional[bool]): ...
+    def install_gettext_translations(self, translations: Any, newstyle: Optional[bool] = ...): ...
+    def install_null_translations(self, newstyle: Optional[bool] = ...): ...
+    def install_gettext_callables(self, gettext: Callable[..., Any], ngettext: Callable[..., Any], newstyle: Optional[bool] = ...): ...
     def uninstall_gettext_translations(self, translations: Any): ...
     def extract_translations(self, source: Any, gettext_functions: Any): ...
     newstyle_gettext: bool