diff --git a/ext/intl/idn/idn.c b/ext/intl/idn/idn.c
index 34d9c1e3873..49b2b307e8b 100644
--- a/ext/intl/idn/idn.c
+++ b/ext/intl/idn/idn.c
@@ -121,7 +121,7 @@ static void php_intl_idn_to(INTERNAL_FUNCTION_PARAMETERS, int mode)
 	RETURN_STRINGL(((char *)converted_utf8), converted_utf8_len, 0);
 }
 
-/* {{{ proto int idn_to_ascii(string domain)
+/* {{{ proto int idn_to_ascii(string domain[, int options [, int status]])
    Converts a UTF-8 domain to ASCII, as defined in the IDNA RFC */
 PHP_FUNCTION(idn_to_ascii)
 {
@@ -130,7 +130,7 @@ PHP_FUNCTION(idn_to_ascii)
 /* }}} */
 
 
-/* {{{ proto int idn_to_ascii(string domain)
+/* {{{ proto int idn_to_utf8(string domain[, int options[, int status]])
    Converts a UTF-8 domain to ASCII, as defined in the IDNA RFC */
 PHP_FUNCTION(idn_to_utf8)
 {