diff --git a/src/ObservableCollections/SynchronizedViewList.cs b/src/ObservableCollections/SynchronizedViewList.cs
index 7fe5634..d0222d3 100644
--- a/src/ObservableCollections/SynchronizedViewList.cs
+++ b/src/ObservableCollections/SynchronizedViewList.cs
@@ -1,4 +1,4 @@
-using ObservableCollections.Internal;
+using ObservableCollections.Internal;
 using System;
 using System.Collections;
 using System.Collections.Generic;
@@ -272,7 +272,10 @@ private void Parent_ViewChanged(in SynchronizedViewChangedEventArgs<T, TView> e)
                     {
                         if (e.NewStartingIndex == -1)
                         {
+                            var index = listView.Count;
                             listView.Add(e.NewItem.View);
+                            OnCollectionChanged(e.WithNewStartingIndex(index));
+                            return;
                         }
                         else
                         {