diff --git a/reactos/include/psdk/winuser.h b/reactos/include/psdk/winuser.h
index fad30244c28..704d7df5f34 100644
--- a/reactos/include/psdk/winuser.h
+++ b/reactos/include/psdk/winuser.h
@@ -89,10 +89,16 @@ extern "C" {
 #define KLF_REPLACELANG	16
 #define KLF_NOTELLSHELL	128
 #define KLF_SETFORPROCESS	256
+#if (_WIN32_WINNT >= 0x0500)
+#define KLF_SHIFTLOCK  65535
+#define KLF_RESET 0x40000000
+#endif  /*(_WIN32_WINNT >= 0x0500) */
 #define KL_NAMELENGTH 9
+#if (WINVER >= 0x0500)
 #define INPUTLANGCHANGE_BACKWARD   4
 #define INPUTLANGCHANGE_FORWARD    2
 #define INPUTLANGCHANGE_SYSCHARSET 1
+#endif /* (WINVER >= 0x0500) */
 #define MF_ENABLED	0
 #define MF_GRAYED	1
 #define MF_DISABLED	2