PERLVAR(I, utf8locale, bool) /* utf8 locale detected */
PERLVAR(I, in_utf8_CTYPE_locale, bool)
-PERLVAR(I, warn_locale, SV *)
+#ifdef USE_LOCALE_CTYPE
+ PERLVAR(I, warn_locale, SV *)
+#endif
PERLVARA(I, colors,6, char *) /* values from PERL_RE_COLORS env var */