diff --git a/lib/widgets/common/grid/sections/fixed/section_layout_builder.dart b/lib/widgets/common/grid/sections/fixed/section_layout_builder.dart
index 316291736..accf3d9d3 100644
--- a/lib/widgets/common/grid/sections/fixed/section_layout_builder.dart
+++ b/lib/widgets/common/grid/sections/fixed/section_layout_builder.dart
@@ -11,7 +11,7 @@ import 'package:tuple/tuple.dart';
 class FixedExtentSectionLayoutBuilder<T> extends SectionLayoutBuilder<T> {
   int _currentIndex = 0;
   double _currentOffset = 0;
-  List<Size> _itemSizes;
+  final List<Size> _itemSizes;
 
   FixedExtentSectionLayoutBuilder({
     required super.sections,