diff --git a/include/wx/os2/palette.h b/include/wx/os2/palette.h
index 78d794277b..e3ab2ac73b 100644
--- a/include/wx/os2/palette.h
+++ b/include/wx/os2/palette.h
@@ -13,6 +13,7 @@
 #define _WX_PALETTE_H_
 
 #include "wx/gdiobj.h"
+#include "wx/os2/private.h"
 
 class WXDLLEXPORT wxPalette;