diff --git a/src/libcharon/plugins/eap_tnc/eap_tnc.c b/src/libcharon/plugins/eap_tnc/eap_tnc.c
index dd4ed5322..d47fd379e 100644
--- a/src/libcharon/plugins/eap_tnc/eap_tnc.c
+++ b/src/libcharon/plugins/eap_tnc/eap_tnc.c
@@ -92,6 +92,18 @@ METHOD(eap_method_t, get_msk, status_t,
 	return FAILED;
 }
 
+METHOD(eap_method_t, get_identifier, u_int8_t,
+	private_eap_tnc_t *this)
+{
+	return this->tls_eap->get_identifier(this->tls_eap);
+}
+
+METHOD(eap_method_t, set_identifier, void,
+	private_eap_tnc_t *this, u_int8_t identifier)
+{
+	this->tls_eap->set_identifier(this->tls_eap, identifier);
+}
+
 METHOD(eap_method_t, is_mutual, bool,
 	private_eap_tnc_t *this)
 {
@@ -126,6 +138,8 @@ static eap_tnc_t *eap_tnc_create(identification_t *server,
 				.get_type = _get_type,
 				.is_mutual = _is_mutual,
 				.get_msk = _get_msk,
+				.get_identifier = _get_identifier,
+				.set_identifier = _set_identifier,
 				.destroy = _destroy,
 			},
 		},