diff --git a/openbsc/include/openbsc/signal.h b/openbsc/include/openbsc/signal.h
index fd13ac7..39319f1 100644
--- a/openbsc/include/openbsc/signal.h
+++ b/openbsc/include/openbsc/signal.h
@@ -219,6 +219,7 @@
 enum signal_msc {
 	S_MSC_LOST,
 	S_MSC_CONNECTED,
+	S_MSC_AUTHENTICATED,
 };
 
 struct osmo_msc_data;
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_msc.c b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
index a979681..5517d30 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_msc.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_msc.c
@@ -422,12 +422,16 @@
 
 static void send_id_get_response(struct osmo_msc_data *data, int fd)
 {
+	struct msc_signal_data sig;
 	struct msgb *msg;
 
 	msg = bsc_msc_id_get_resp(data->bsc_token);
 	if (!msg)
 		return;
 	msc_queue_write(data->msc_con, msg, IPAC_PROTO_IPACCESS);
+
+	sig.data = data;
+	osmo_signal_dispatch(SS_MSC, S_MSC_AUTHENTICATED, &sig);
 }
 
 int osmo_bsc_msc_init(struct osmo_msc_data *data)