diff --git a/lib/url.c b/lib/url.c index c7a91a4f7c..29beb38535 100644 --- a/lib/url.c +++ b/lib/url.c @@ -4010,7 +4010,12 @@ static void fix_hostname(struct connectdata *conn, struct hostname *host) #ifdef USE_LIBIDN2 if(idn2_check_version(IDN2_VERSION)) { char *ace_hostname = NULL; - int rc = idn2_lookup_ul((const char *)host->name, &ace_hostname, 0); +#ifdef IDN2_TRANSITIONAL + int flags = IDN2_NFC_INPUT | IDN2_TRANSITIONAL; +#else + int flags = IDN2_NFC_INPUT; +#endif + int rc = idn2_lookup_ul((const char *)host->name, &ace_hostname, flags); if(rc == IDN2_OK) { host->encalloc = (char *)ace_hostname; /* change the name pointer to point to the encoded hostname */