diff --git a/reactos/include/xdk/rtlfuncs.h b/reactos/include/xdk/rtlfuncs.h
index 5f2735325e8..01059d43e50 100644
--- a/reactos/include/xdk/rtlfuncs.h
+++ b/reactos/include/xdk/rtlfuncs.h
@@ -3306,7 +3306,7 @@ RtlCheckBit(
 #undef ASSERT
 #define ASSERT NT_ASSERT
 #undef ASSERTMSG
-#define ASSERTMSG NT_ASSERT
+#define ASSERTMSG NT_ASSERTMSG
 #undef ASSERTMSGW
 #define ASSERTMSGW NT_ASSERTMSGW
 #undef RTL_VERIFY