diff --git a/ext/standard/mail.c b/ext/standard/mail.c
index 37973bbc139..921036b939a 100644
--- a/ext/standard/mail.c
+++ b/ext/standard/mail.c
@@ -86,7 +86,7 @@ PHP_FUNCTION(mail)
 	char *subject=NULL, *extra_cmd=NULL;
 	int to_len, message_len, headers_len;
 	int subject_len, extra_cmd_len, i;
-	char *force_extra_parameters = INI_STR("mail_force_extra_parameters");
+	char *force_extra_parameters = INI_STR("mail.force_extra_parameters");
 	char *to_r, *subject_r;
 
 	if (PG(safe_mode) && (ZEND_NUM_ARGS() == 5)) {