diff --git a/src/ObservableCollections/Internal/NotifyCollectionChangedSynchronizedView.cs b/src/ObservableCollections/Internal/NotifyCollectionChangedSynchronizedView.cs
index 46234db..b496115 100644
--- a/src/ObservableCollections/Internal/NotifyCollectionChangedSynchronizedView.cs
+++ b/src/ObservableCollections/Internal/NotifyCollectionChangedSynchronizedView.cs
@@ -52,7 +52,7 @@ namespace ObservableCollections.Internal
             }
         }
 
-        IEnumerator IEnumerable.GetEnumerator() => parent.GetEnumerator();
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
 
         public bool IsMatch(T value, TView view) => currentFilter.IsMatch(value, view);
         public void WhenTrue(T value, TView view) => currentFilter.WhenTrue(value, view);