diff --git a/include/mshtml.idl b/include/mshtml.idl
index de15c6c2ce..f7ebd9e71a 100644
--- a/include/mshtml.idl
+++ b/include/mshtml.idl
@@ -407,6 +407,12 @@ interface IHTMLFrameBase;
 interface IHTMLStorage;
 interface IHTMLStyleSheetsCollection;
 interface IHTMLTableSection;
+interface IHTMLWindow2;
+interface IHTMLWindow3;
+interface IHTMLWindow4;
+interface IHTMLWindow5;
+interface IHTMLWindow6;
+interface IHTMLWindow7;
 interface IDOMEvent;
 interface IDisplayPointer;
 interface IDisplayServices;
