diff --git a/include/mshtmdid.h b/include/mshtmdid.h
index a062131108f..b43ead4fe3d 100644
--- a/include/mshtmdid.h
+++ b/include/mshtmdid.h
@@ -1798,6 +1798,28 @@
 /* IHTMLImgElement2 */
 #define DISPID_IHTMLIMGELEMENT2_LONGDESC  DISPID_IMG+19
 
+/* IHTMLXMLHttpRequest */
+#define DISPID_IHTMLXMLHTTPREQUEST_READYSTATE             DISPID_XMLHTTPREQUEST+2
+#define DISPID_IHTMLXMLHTTPREQUEST_RESPONSEBODY           DISPID_XMLHTTPREQUEST+3
+#define DISPID_IHTMLXMLHTTPREQUEST_RESPONSETEXT           DISPID_XMLHTTPREQUEST+4
+#define DISPID_IHTMLXMLHTTPREQUEST_RESPONSEXML            DISPID_XMLHTTPREQUEST+5
+#define DISPID_IHTMLXMLHTTPREQUEST_STATUS                 DISPID_XMLHTTPREQUEST+6
+#define DISPID_IHTMLXMLHTTPREQUEST_STATUSTEXT             DISPID_XMLHTTPREQUEST+7
+#define DISPID_IHTMLXMLHTTPREQUEST_ONREADYSTATECHANGE     DISPID_EVPROP_ONREADYSTATECHANGE
+#define DISPID_IHTMLXMLHTTPREQUEST_ABORT                  DISPID_XMLHTTPREQUEST+9
+#define DISPID_IHTMLXMLHTTPREQUEST_OPEN                   DISPID_XMLHTTPREQUEST+10
+#define DISPID_IHTMLXMLHTTPREQUEST_SEND                   DISPID_XMLHTTPREQUEST+11
+#define DISPID_IHTMLXMLHTTPREQUEST_GETALLRESPONSEHEADERS  DISPID_XMLHTTPREQUEST+12
+#define DISPID_IHTMLXMLHTTPREQUEST_GETRESPONSEHEADER      DISPID_XMLHTTPREQUEST+13
+#define DISPID_IHTMLXMLHTTPREQUEST_SETREQUESTHEADER       DISPID_XMLHTTPREQUEST+14
+
+/* IHTMLXMLHttpRequest2 */
+#define DISPID_IHTMLXMLHTTPREQUEST2_TIMEOUT    DISPID_XMLHTTPREQUEST+15
+#define DISPID_IHTMLXMLHTTPREQUEST2_ONTIMEOUT  DISPID_EVPROP_TIMEOUT
+
+/* IHTMLXMLHttpRequestFactory */
+#define DISPID_IHTMLXMLHTTPREQUESTFACTORY_CREATE  DISPID_VALUE
+
 /* IOmHistory */
 #define DISPID_IOMHISTORY_LENGTH    DISPID_HISTORY
 #define DISPID_IOMHISTORY_BACK      (DISPID_HISTORY+1)
diff --git a/include/mshtml.idl b/include/mshtml.idl
index d599ebaeb3b..57f77e8d064 100644
--- a/include/mshtml.idl
+++ b/include/mshtml.idl
@@ -7801,6 +7801,68 @@ methods:
     BSTR longDesc();
 }
 
+/*****************************************************************************
+ *    IHTMLXMLHttpRequest interface
+ */
+[
+    odl,
+    oleautomation,
+    dual,
+    uuid(3051040a-98b5-11cf-bb82-00aa00bdce0b)
+]
+interface IHTMLXMLHttpRequest : IDispatch
+{
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_READYSTATE)]
+    HRESULT readyState([out, retval] long *p);
+
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_RESPONSEBODY)]
+    HRESULT responseBody([out, retval] VARIANT *p);
+
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_RESPONSETEXT)]
+    HRESULT responseText([out, retval] BSTR *p);
+
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_RESPONSEXML)]
+    HRESULT responseXML([out, retval] IDispatch **p);
+
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_STATUS)]
+    HRESULT status([out, retval] long *p);
+
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_STATUSTEXT)]
+    HRESULT statusText([out, retval] BSTR *p);
+
+    [propput, id(DISPID_IHTMLXMLHTTPREQUEST_ONREADYSTATECHANGE), displaybind, bindable]
+    HRESULT onreadystatechange([in] VARIANT v);
+
+    [propget, id(DISPID_IHTMLXMLHTTPREQUEST_ONREADYSTATECHANGE), displaybind, bindable]
+    HRESULT onreadystatechange([out, retval] VARIANT *p);
+
+    [id(DISPID_IHTMLXMLHTTPREQUEST_ABORT)] HRESULT abort();
+
+    [id(DISPID_IHTMLXMLHTTPREQUEST_OPEN)]
+    HRESULT open(
+            [in] BSTR bstrMethod,
+            [in] BSTR bstrUrl,
+            [in] VARIANT varAsync,
+            [in, optional] VARIANT varUser,
+            [in, optional] VARIANT varPassword);
+
+    [id(DISPID_IHTMLXMLHTTPREQUEST_SEND)]
+    HRESULT send([in, optional] VARIANT varBody);
+
+    [id(DISPID_IHTMLXMLHTTPREQUEST_GETALLRESPONSEHEADERS)]
+    HRESULT getAllResponseHeaders([out, retval] BSTR *p);
+
+    [id(DISPID_IHTMLXMLHTTPREQUEST_GETRESPONSEHEADER)]
+    HRESULT getResponseHeader(
+            [in] BSTR bstrHeader,
+            [out, retval] BSTR *p);
+
+    [id(DISPID_IHTMLXMLHTTPREQUEST_SETREQUESTHEADER)]
+    HRESULT setRequestHeader(
+            [in] BSTR bstrHeader,
+            [in] BSTR bstrValue);
+}
+
 /*****************************************************************************
  *    IHTMLControlElement interface
  */