diff --git a/reactos/include/psdk/wtypes.idl b/reactos/include/psdk/wtypes.idl
index e41544a6111..844fda74c09 100644
--- a/reactos/include/psdk/wtypes.idl
+++ b/reactos/include/psdk/wtypes.idl
@@ -29,9 +29,6 @@ import "guiddef.h";
 
 interface IWinTypes
 {
-cpp_quote("#ifndef __wtypes_h__ ") /* fix compatible issue with VC and dxsdk use same name as ms __wtypes_h__*/
-cpp_quote("#define __wtypes_h__ ") /* fix compatible issue with VC and dxsdk use same name as ms __wtypes_h__*/
-
 
 /******************** BASIC WIN32 TYPES ********************/
 cpp_quote("#if 0 /* winnt.h */") /* don't redefine these */
@@ -815,5 +812,4 @@ typedef union switch(DWORD tyspec)
         } ByObjectId;
 } uCLSSPEC;
 
-cpp_quote("#endif") /* fix compatible issue with VC and dxsdk use same name as ms __wtypes_h__*/
 } /* interface IWinTypes */