diff --git a/lib/outlook/internal_tree/basic.ex b/lib/outlook/internal_tree/basic.ex
index cb5e50b..faec622 100644
--- a/lib/outlook/internal_tree/basic.ex
+++ b/lib/outlook/internal_tree/basic.ex
@@ -4,7 +4,7 @@ defmodule Outlook.InternalTree.Basic do
   alias Outlook.InternalTree.TranslationUnit
 
   def clean_eph([%TranslationUnit{} = node | rest]) do
-    [ node | rest ]
+    [ %TranslationUnit{node | eph: %{}} | clean_eph(rest) ]
   end
 
   def clean_eph([%InternalNode{type: :element} = node | rest]) do