diff --git a/lib/mudbrick.ex b/lib/mudbrick.ex
index eb5b91d..25f1480 100644
--- a/lib/mudbrick.ex
+++ b/lib/mudbrick.ex
@@ -217,7 +217,7 @@ defmodule Mudbrick do
         context
         |> add(%ContentStream.QPush{})
         |> add(ContentStream.Cm.new(cm_opts(image.value, opts)))
-        |> add(%ContentStream.Do{image: image.value})
+        |> add(%ContentStream.Do{image_identifier: image.value.resource_identifier})
         |> add(%ContentStream.QPop{})
 
       :error ->
diff --git a/lib/mudbrick/content_stream/do.ex b/lib/mudbrick/content_stream/do.ex
index c41039c..04b9f16 100644
--- a/lib/mudbrick/content_stream/do.ex
+++ b/lib/mudbrick/content_stream/do.ex
@@ -1,11 +1,11 @@
 defmodule Mudbrick.ContentStream.Do do
   @moduledoc false
-  defstruct [:image]
+  defstruct [:image_identifier]
 
   defimpl Mudbrick.Object do
     def to_iodata(operator) do
       [
-        Mudbrick.Object.to_iodata(operator.image.resource_identifier),
+        Mudbrick.Object.to_iodata(operator.image_identifier),
         " Do"
       ]
     end