diff --git a/reactos/subsystems/win32/win32k/win32k.rbuild b/reactos/subsystems/win32/win32k/win32k.rbuild
index bc6381386e4..4eb69853103 100644
--- a/reactos/subsystems/win32/win32k/win32k.rbuild
+++ b/reactos/subsystems/win32/win32k/win32k.rbuild
@@ -9,6 +9,7 @@
 	<define name="__USE_W32API" />
 	<define name="_WIN32_WINNT">0x0501</define>
 	<define name="WINVER">0x600</define>
+	<define name="LANGPACK" />
 	<define name="_WIN32K_" />
 	<pch>w32k.h</pch>