diff --git a/include/osmocom/trau/trau_sync.h b/include/osmocom/trau/trau_sync.h
index 46595be..bd99586 100644
--- a/include/osmocom/trau/trau_sync.h
+++ b/include/osmocom/trau/trau_sync.h
@@ -17,3 +17,4 @@
 		     enum osmo_tray_sync_pat_id pat_id, void *user_data);
 
 void osmo_trau_sync_rx_ubits(struct osmo_fsm_inst *fi, const ubit_t *bits, size_t n_bits);
+void osmo_trau_sync_set_pat(struct osmo_fsm_inst *fi, enum osmo_tray_sync_pat_id pat_id);