diff --git a/lib/outlook/internal_tree/raw_internal_basic.ex b/lib/outlook/internal_tree/raw_internal_basic.ex
index 15235e4..cacc9db 100644
--- a/lib/outlook/internal_tree/raw_internal_basic.ex
+++ b/lib/outlook/internal_tree/raw_internal_basic.ex
@@ -10,7 +10,7 @@ defmodule Outlook.InternalTree.RawInternalBasic do
 
   @splitmarker "@@translationunit@@"
   @nonperiodmarker "@@nonperiod@@"
-  @void_elements ~w(img br hr)
+  @void_elements ~w(img br hr iframe)
 
   def set_split_markers([ %InternalNode{type: :text} = textnode | rest ]) do
     [ %InternalNode{textnode |