diff --git a/reactos/sdk/include/psdk/xmllite.idl b/reactos/sdk/include/psdk/xmllite.idl
index 5dc0012aaa0..0fd68f7b781 100644
--- a/reactos/sdk/include/psdk/xmllite.idl
+++ b/reactos/sdk/include/psdk/xmllite.idl
@@ -300,3 +300,5 @@ cpp_quote("STDAPI CreateXmlWriter(REFIID riid, void **ppvObject, IMalloc *pMallo
 cpp_quote("typedef IUnknown IXmlWriterOutput;")
 cpp_quote("STDAPI CreateXmlWriterOutputWithEncodingName(IUnknown *stream, IMalloc *pMalloc,")
 cpp_quote("                                             LPCWSTR encoding, IXmlWriterOutput **output);")
+cpp_quote("STDAPI CreateXmlWriterOutputWithEncodingCodePage(IUnknown *stream, IMalloc *pMalloc,")
+cpp_quote("    UINT codepage, IXmlWriterOutput **output);")