diff --git a/src/auth.cc b/src/auth.cc
index 747a6f4..77c6e47 100644
--- a/src/auth.cc
+++ b/src/auth.cc
@@ -405,7 +405,7 @@ static void Auth_realm_delete(AuthRealm_t *realm)
    dFree(realm->nonce);
    dFree(realm->opaque);
    dFree(realm->domain);
-   dFree(realm);
+   delete realm;
 }
 
 static int Auth_realm_includes_path(const AuthRealm_t *realm, const char *path)
@@ -544,7 +544,7 @@ static void Auth_do_auth_dialog_cb(const char *user, const char *password,
 
    /* find or create the realm */
    if (!(realm = Auth_realm_by_name(host, data->auth_parse->realm.value().c_str()))) {
-      realm = dNew0(AuthRealm_t, 1);
+      realm = std::make_unique< AuthRealm_t >().release();
       realm->name = dStrdup(data->auth_parse->realm.value().c_str());
       realm->paths = dList_new(1);
       dList_append(host->realms, realm);
diff --git a/src/auth.hh b/src/auth.hh
index e0c397b..3f5647f 100644
--- a/src/auth.hh
+++ b/src/auth.hh
@@ -6,7 +6,7 @@ enum AuthParseHTTPAuthType_t { TYPENOTSET, BASIC, DIGEST };
 enum AuthParseDigestAlgorithm_t { ALGORITHMNOTSET, MD5, MD5SESS };
 enum AuthParseDigestQOP_t { QOPNOTSET, AUTH, AUTHINT };
 
-typedef struct {
+struct AuthRealm_t{
    enum AuthParseHTTPAuthType_t type;
    char *name;
    Dlist *paths; /* stripped of any trailing '/', so the root path is "" */
@@ -21,7 +21,7 @@ typedef struct {
    enum AuthParseDigestAlgorithm_t algorithm;
    char *domain; /* NOT USED */
    enum AuthParseDigestQOP_t qop;
-} AuthRealm_t;
+};
 
 
 char *a_Auth_get_auth_str(const DilloUrl *url, const char *request_uri);