diff --git a/dll/win32/kernel32/k32.h b/dll/win32/kernel32/k32.h
index ec2543a4f00..c84dabe0086 100644
--- a/dll/win32/kernel32/k32.h
+++ b/dll/win32/kernel32/k32.h
@@ -32,6 +32,7 @@
 #undef NTDDI_VERSION
 #define NTDDI_VERSION NTDDI_WS03SP1
 
+#define NTOS_MODE_USER
 #include <ndk/cmfuncs.h>
 #include <ndk/exfuncs.h>
 #include <ndk/iofuncs.h>
diff --git a/dll/win32/kernel32/kernel32_vista/k32_vista.h b/dll/win32/kernel32/kernel32_vista/k32_vista.h
index 7f78e53e68a..6b0c3ce42ae 100644
--- a/dll/win32/kernel32/kernel32_vista/k32_vista.h
+++ b/dll/win32/kernel32/kernel32_vista/k32_vista.h
@@ -10,6 +10,7 @@
 #undef NTDDI_VERSION
 #define NTDDI_VERSION NTDDI_WS03SP1
 
+#define NTOS_MODE_USER
 #include <ndk/iofuncs.h>
 #include <ndk/kefuncs.h>
 #include <ndk/obfuncs.h>