diff --git a/examples/mine_digger/lib/main.dart b/examples/mine_digger/lib/main.dart
index 103ed854328..c8aa3ce91f8 100644
--- a/examples/mine_digger/lib/main.dart
+++ b/examples/mine_digger/lib/main.dart
@@ -113,7 +113,7 @@ class MineDiggerApp extends App {
                 probe(ix, iy);
             },
             onLongPress: () {
-              userFeedback.performHapticFeedback(HapticFeedbackType_LONG_PRESS);
+              userFeedback.performHapticFeedback(HapticFeedbackType.LONG_PRESS);
               flag(ix, iy);
             },
             child: new Listener(
diff --git a/sky/packages/sky/lib/src/widgets/date_picker.dart b/sky/packages/sky/lib/src/widgets/date_picker.dart
index e20ae057f77..b5f7c92ba80 100644
--- a/sky/packages/sky/lib/src/widgets/date_picker.dart
+++ b/sky/packages/sky/lib/src/widgets/date_picker.dart
@@ -48,14 +48,14 @@ class DatePicker extends StatefulComponent {
   DatePickerMode _mode = DatePickerMode.day;
 
   void _handleModeChanged(DatePickerMode mode) {
-    userFeedback.performHapticFeedback(HapticFeedbackType_VIRTUAL_KEY);
+    userFeedback.performHapticFeedback(HapticFeedbackType.VIRTUAL_KEY);
     setState(() {
       _mode = mode;
     });
   }
 
   void _handleYearChanged(DateTime dateTime) {
-    userFeedback.performHapticFeedback(HapticFeedbackType_VIRTUAL_KEY);
+    userFeedback.performHapticFeedback(HapticFeedbackType.VIRTUAL_KEY);
     setState(() {
       _mode = DatePickerMode.day;
     });
@@ -64,7 +64,7 @@ class DatePicker extends StatefulComponent {
   }
 
   void _handleDayChanged(DateTime dateTime) {
-    userFeedback.performHapticFeedback(HapticFeedbackType_VIRTUAL_KEY);
+    userFeedback.performHapticFeedback(HapticFeedbackType.VIRTUAL_KEY);
     if (onChanged != null)
       onChanged(dateTime);
   }
diff --git a/sky/services/activity/activity.mojom b/sky/services/activity/activity.mojom
index 45a8d1e5321..4b9f1c2d50a 100644
--- a/sky/services/activity/activity.mojom
+++ b/sky/services/activity/activity.mojom
@@ -28,7 +28,9 @@ struct TaskDescription {
   uint32 primaryColor;
 };
 
-enum SystemUIVisibility {
+// TODO(jamesr): This should be called SystemUIVisibility (note case). This name
+// is a workaround for https://github.com/domokit/mojo/issues/445.
+enum SystemUiVisibility {
   STANDARD,
   FULLSCREEN,
   IMMERSIVE,
@@ -52,7 +54,7 @@ interface Activity {
   StartActivity(Intent intent);
   FinishCurrentActivity();
   SetTaskDescription(TaskDescription description);
-  SetSystemUIVisibility(SystemUIVisibility visibility);
+  SetSystemUIVisibility(SystemUiVisibility visibility);
   SetRequestedOrientation(ScreenOrientation orientation);
 
   // These are stored off the Activity on Android, but probably belong in a