diff --git a/reactos/dll/win32/wininet/internet.h b/reactos/dll/win32/wininet/internet.h
index 2e7f642b32a..bb694e91b3e 100644
--- a/reactos/dll/win32/wininet/internet.h
+++ b/reactos/dll/win32/wininet/internet.h
@@ -23,9 +23,6 @@
 #ifndef _WINE_INTERNET_H_
 #define _WINE_INTERNET_H_
 
-/* ReactOS-specific definitions */
-#define CP_UNIXCP   CP_THREAD_ACP
-
 #ifndef __WINE_CONFIG_H
 # error You must include config.h to use this header
 #endif