PERLVARI(Idef_layerlist, PerlIO_list_t *,NULL)
#endif
-PERLVARI(Iencoding, SV*, Nullsv) /* character encoding */
+PERLVARI(Iencoding, SV*, NULL) /* character encoding */
PERLVAR(Idebug_pad, struct perl_debug_pad) /* always needed because of the re extension */