diff --git a/Include/pystate.h b/Include/pystate.h
@@ -55,7 +55,12 @@ typedef struct {
    int malloc_stats;       /* PYTHONMALLOCSTATS */
    int coerce_c_locale;    /* PYTHONCOERCECLOCALE, -1 means unknown */
    int coerce_c_locale_warn; /* PYTHONCOERCECLOCALE=warn */
-    int utf8_mode;          /* PYTHONUTF8, -X utf8; -1 means unknown */
    wchar_t *pycache_prefix; /* PYTHONPYCACHEPREFIX, -X pycache_prefix=PATH */

    wchar_t *program_name;  /* Program name, see also Py_GetProgramName() */