diff --git a/packages/flutter/lib/material.dart b/packages/flutter/lib/material.dart
index 046437e0e0..407e821ec4 100644
--- a/packages/flutter/lib/material.dart
+++ b/packages/flutter/lib/material.dart
@@ -24,7 +24,7 @@ export 'src/material/drawer.dart';
 export 'src/material/drawer_header.dart';
 export 'src/material/drawer_item.dart';
 export 'src/material/divider.dart';
-export 'src/material/dropdown.dart';
+export 'src/material/drop_down.dart';
 export 'src/material/flat_button.dart';
 export 'src/material/flexible_space_bar.dart';
 export 'src/material/floating_action_button.dart';
diff --git a/packages/flutter/lib/src/material/dropdown.dart b/packages/flutter/lib/src/material/drop_down.dart
similarity index 100%
rename from packages/flutter/lib/src/material/dropdown.dart
rename to packages/flutter/lib/src/material/drop_down.dart