diff --git a/src/flatcollections-array/FlatArray/FlatArray.T.FlatList/FlatArray.FlatList.Impl.Inner.cs b/src/flatcollections-array/FlatArray/FlatArray.T.FlatList/FlatArray.FlatList.Impl.Inner.cs
index 32bfd6f3..79c3d21c 100644
--- a/src/flatcollections-array/FlatArray/FlatArray.T.FlatList/FlatArray.FlatList.Impl.Inner.cs
+++ b/src/flatcollections-array/FlatArray/FlatArray.T.FlatList/FlatArray.FlatList.Impl.Inner.cs
@@ -59,7 +59,9 @@ private void InnerCopyToChecked(
                 ? new ReadOnlySpan<T>(items)
                 : new ReadOnlySpan<T>(items, 0, length);
 
-            var destSpan = new Span<T>(array, arrayIndex, length);
+            var destSpan = arrayIndex == default && length == array.Length
+                ? new Span<T>(array)
+                : new Span<T>(array, arrayIndex, length);
 
             sourceSpan.CopyTo(destSpan);
         }