diff --git a/reactos/dll/win32/iphlpapi/iphlpapi_private.h b/reactos/dll/win32/iphlpapi/iphlpapi_private.h
index 4210198a20c..3a01c5794cf 100644
--- a/reactos/dll/win32/iphlpapi/iphlpapi_private.h
+++ b/reactos/dll/win32/iphlpapi/iphlpapi_private.h
@@ -19,8 +19,6 @@
 # include <resolv.h>
 #endif
 
-#undef _WIN32_WINNT
-#define _WIN32_WINNT 0x500
 #define WIN32_NO_STATUS
 #include <winsock2.h>
 #include <ws2tcpip.h>