diff --git a/src/auth.cc b/src/auth.cc
index 063d6c0..747a6f4 100644
--- a/src/auth.cc
+++ b/src/auth.cc
@@ -56,9 +56,9 @@ struct AuthDialogData_t
  */
 static std::vector< AuthHost_t * > auth_hosts;
 
-static AuthParse_t *Auth_parse_new(void)
+static std::unique_ptr< AuthParse_t > Auth_parse_new(void)
 {
-   AuthParse_t *auth_parse = std::make_unique< AuthParse_t >().release();
+   auto auth_parse = std::make_unique< AuthParse_t >();
    auth_parse->ok = 0;
    auth_parse->type = TYPENOTSET;
    auth_parse->stale = 0;
@@ -67,11 +67,6 @@ static AuthParse_t *Auth_parse_new(void)
    return auth_parse;
 }
 
-static void Auth_parse_free(AuthParse_t *auth_parse)
-{
-	delete auth_parse;
-}
-
 static int Auth_path_is_inside(const char *path1, const char *path2, int len)
 {
    /*
@@ -628,19 +623,17 @@ static int Auth_do_auth_dialog(const AuthParse_t *auth_parse,
 static int Auth_do_auth(char *challenge, enum AuthParseHTTPAuthType_t type,
                         const DilloUrl *url)
 {
-   AuthParse_t *auth_parse;
    int reload = 0;
 
    _MSG("auth.c: Auth_do_auth: challenge={%s}\n", challenge);
-   auth_parse = Auth_parse_new();
+   auto auth_parse = Auth_parse_new();
    auth_parse->type = type;
-   Auth_parse_challenge(auth_parse, challenge);
+   Auth_parse_challenge(auth_parse.get(), challenge);
    if (auth_parse->ok)
       reload =
-         Auth_do_auth_required(auth_parse, url) ?
-         Auth_do_auth_dialog(auth_parse, url)
+         Auth_do_auth_required(auth_parse.get(), url) ?
+         Auth_do_auth_dialog(auth_parse.get(), url)
          : 1;
-   Auth_parse_free(auth_parse);
 
    return reload;
 }