diff --git a/src/libosmo-pfcp/gen__pfcp_ies_auto.c b/src/libosmo-pfcp/gen__pfcp_ies_auto.c
index 5649fe3..f705417 100644
--- a/src/libosmo-pfcp/gen__pfcp_ies_auto.c
+++ b/src/libosmo-pfcp/gen__pfcp_ies_auto.c
@@ -293,7 +293,7 @@ static const struct osmo_gtlv_gen_ie_o ies_in_msg_session_est_req[] = {
 };
 
 static const struct osmo_gtlv_gen_ie_o ies_in_msg_session_est_resp[] = {
-	M(ALL_FROM_NAME, "node_id"),
+	O(ALL_FROM_NAME, "node_id"),
 	Ms(cause),
 	Os(offending_ie),
 	O(f_seid, "up_f_seid"),
diff --git a/tests/libosmo-pfcp/pfcp_test.c b/tests/libosmo-pfcp/pfcp_test.c
index 801932c..408d263 100644
--- a/tests/libosmo-pfcp/pfcp_test.c
+++ b/tests/libosmo-pfcp/pfcp_test.c
@@ -273,6 +273,7 @@ struct osmo_pfcp_msg tests[] = {
 			.seid = 0x0123456789abcdef,
 		},
 		.ies.session_est_resp = {
+			.node_id_present = true,
 			.node_id = {
 				.type = OSMO_PFCP_NODE_ID_T_IPV4,
 				.ip.u.sin = {