diff --git a/rtl/objpas/types.pp b/rtl/objpas/types.pp
index c4b33fdf25..495d9f8db3 100644
--- a/rtl/objpas/types.pp
+++ b/rtl/objpas/types.pp
@@ -21,6 +21,11 @@ unit types;
        Windows;
 {$endif Windows}
 
+{$ifdef mswindows}
+const
+  RT_RCDATA = Windows.RT_RCDATA deprecated 'Use Windows.RT_RCDATA instead';
+{$endif mswindows}
+
 type
   DWORD = LongWord;