diff --git a/editor/idl/nsIEditorShell.idl b/editor/idl/nsIEditorShell.idl
index db979d1ba39..a6e86bbba92 100644
--- a/editor/idl/nsIEditorShell.idl
+++ b/editor/idl/nsIEditorShell.idl
@@ -36,6 +36,9 @@ interface nsIEditorShell : nsISupports
   readonly attribute wstring           contentsAsText;
   readonly attribute wstring           contentsAsHTML;
 
+  readonly attribute wstring           selectionAsHTML;
+  readonly attribute wstring           selectionAsText;
+
   readonly attribute nsIDOMDocument    editorDocument;
   readonly attribute nsIDOMSelection   editorSelection;