diff --git a/lib/pages/reader/scaffold.dart b/lib/pages/reader/scaffold.dart
index a60cdb3..214dc10 100644
--- a/lib/pages/reader/scaffold.dart
+++ b/lib/pages/reader/scaffold.dart
@@ -1135,7 +1135,7 @@ class _GroupedChaptersViewState extends State<_GroupedChaptersView>
 
   late final ScrollController _scrollController;
 
-  late final initialGroupName;
+  late final String initialGroupName;
 
   @override
   void initState() {