diff --git a/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/FreezedView.cs b/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/FreezedView.cs
index 73eeb82..710428c 100644
--- a/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/FreezedView.cs
+++ b/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/FreezedView.cs
@@ -114,7 +114,7 @@ namespace ObservableCollections.Internal
         public event Action<NotifyCollectionChangedAction> CollectionStateChanged;
         public event NotifyCollectionChangedEventHandler<T> RoutingCollectionChanged;
 
-        public object SyncRoot { get; } = new();
+        public object SyncRoot { get; } = new object();
 
         public FreezedSortableView(IEnumerable<T> source, Func<T, TView> selector)
         {
diff --git a/src/ObservableCollections/Internal/FreezedView.cs b/src/ObservableCollections/Internal/FreezedView.cs
index 371ee87..95f7748 100644
--- a/src/ObservableCollections/Internal/FreezedView.cs
+++ b/src/ObservableCollections/Internal/FreezedView.cs
@@ -114,7 +114,7 @@ namespace ObservableCollections.Internal
         public event Action<NotifyCollectionChangedAction>? CollectionStateChanged;
         public event NotifyCollectionChangedEventHandler<T>? RoutingCollectionChanged;
 
-        public object SyncRoot { get; } = new();
+        public object SyncRoot { get; } = new object();
 
         public FreezedSortableView(IEnumerable<T> source, Func<T, TView> selector)
         {