diff --git a/lib/widgets/controller.dart b/lib/widgets/controller.dart
index 942f2c94..9bfe8f71 100644
--- a/lib/widgets/controller.dart
+++ b/lib/widgets/controller.dart
@@ -13,7 +13,7 @@ class QuillController extends ChangeNotifier {
   TextSelection selection;
   Style toggledStyle = Style();
 
-  QuillController({@required this.document, @required this.selection, this.toggledStyle})
+  QuillController({@required this.document, @required this.selection})
       : assert(document != null),
         assert(selection != null);