#if wxUSE_STREAMS
-class WXDLLIMPEXP_BASE wxTextInputStream;
-class WXDLLIMPEXP_BASE wxTextOutputStream;
+class WXDLLIMPEXP_FWD_BASE wxTextInputStream;
+class WXDLLIMPEXP_FWD_BASE wxTextOutputStream;
typedef wxTextInputStream& (*__wxTextInputManip)(wxTextInputStream&);
typedef wxTextOutputStream& (*__wxTextOutputManip)(wxTextOutputStream&);