diff --git a/Microsoft.Toolkit.Uwp.UI/AdvancedCollectionView/AdvancedCollectionView.cs b/Microsoft.Toolkit.Uwp.UI/AdvancedCollectionView/AdvancedCollectionView.cs
index 278ef50d1fe..a57e825d40b 100644
--- a/Microsoft.Toolkit.Uwp.UI/AdvancedCollectionView/AdvancedCollectionView.cs
+++ b/Microsoft.Toolkit.Uwp.UI/AdvancedCollectionView/AdvancedCollectionView.cs
@@ -683,7 +683,7 @@ private bool HandleItemAdded(int newStartingIndex, object newItem, int? viewInde
                 }
                 else if (newStartingIndex == _source.Count - 1)
                 {
-                    newViewIndex = _view.Count - 1;
+                    newViewIndex = _view.Count;
                 }
                 else if (viewIndex.HasValue)
                 {
@@ -784,4 +784,4 @@ private bool MoveCurrentToIndex(int i)
             return true;
         }
     }
-}
\ No newline at end of file
+}