diff --git a/reactos/include/psdk/msxml2.idl b/reactos/include/psdk/msxml2.idl
index fb32a79cff9..fe7794046d6 100644
--- a/reactos/include/psdk/msxml2.idl
+++ b/reactos/include/psdk/msxml2.idl
@@ -50,7 +50,7 @@ interface IXSLProcessor;
 cpp_quote("#define DOMDocument DOMDocument2")
 cpp_quote("#define CLSID_DOMDocument CLSID_DOMDocument2")
 
-cpp_quote("#ifndef __WIDL_XMLDOM_H")
+cpp_quote("#ifndef __xmldom_h__")
 typedef enum tagDOMNodeType 
 {  
     NODE_INVALID  		= 0,
@@ -67,7 +67,7 @@ typedef enum tagDOMNodeType
     NODE_DOCUMENT_FRAGMENT 	= 11,
     NODE_NOTATION 		= 12
 } DOMNodeType;
-cpp_quote("#endif   /* __WIDL_XMLDOM_H */")
+cpp_quote("#endif   /* __xmldom_h__ */")
 
 [
 local,