diff --git a/doc/internals/internal-design.rst b/doc/internals/internal-design.rst
index c930126ac73..1fa7229aa98 100644
--- a/doc/internals/internal-design.rst
+++ b/doc/internals/internal-design.rst
@@ -207,7 +207,7 @@ Looking at the private attribute again shows how this indexing information was p
 
 .. ipython:: python
 
-    var._data
+    var.isel(time=0)._data
 
 .. note::