diff --git a/reactos/include/ndk/i386/ketypes.h b/reactos/include/ndk/i386/ketypes.h
index 6ad6aeba6ff..e9c8d7feb5b 100644
--- a/reactos/include/ndk/i386/ketypes.h
+++ b/reactos/include/ndk/i386/ketypes.h
@@ -142,7 +142,11 @@ Author:
 #ifndef CONFIG_SMP
 #define SYNCH_LEVEL             DISPATCH_LEVEL
 #else
+#if (NTDDI_VERSION < NTDDI_WS03)
 #define SYNCH_LEVEL             (IPI_LEVEL - 1)
+#else
+#define SYNCH_LEVEL             (IPI_LEVEL - 2)
+#endif
 #endif
 
 //