diff --git a/channeld/channeld.c b/channeld/channeld.c
index efe3475b7fd6..b6607170c852 100644
--- a/channeld/channeld.c
+++ b/channeld/channeld.c
@@ -688,7 +688,9 @@ static void check_mutual_channel_ready(struct peer *peer)
 	if (peer->channel_ready[LOCAL] && peer->channel_ready[REMOTE]) {
 		/* Make sure the hsmd agrees that this outpoint is
 		 * sufficiently buried. */
-		msg = towire_hsmd_sync_outpoint(NULL, &peer->channel->funding);
+		msg = towire_hsmd_sync_outpoint(NULL,
+						&peer->channel->funding.txid,
+						peer->channel->funding.n);
 		msg = hsm_req(tmpctx, take(msg));
 		if (!fromwire_hsmd_sync_outpoint_reply(msg))
 			status_failed(STATUS_FAIL_HSM_IO,
@@ -770,7 +772,7 @@ static void check_mutual_splice_locked(struct peer *peer)
 	/* Make sure the hsmd agrees that this outpoint is
 	 * sufficiently buried. */
 	const u8 *msg2;
-	msg2 = towire_hsmd_sync_outpoint(NULL, &inflight->outpoint);
+	msg2 = towire_hsmd_sync_outpoint(NULL, &inflight->outpoint.txid, inflight->outpoint.n);
 	msg2 = hsm_req(tmpctx, take(msg2));
 	if (!fromwire_hsmd_sync_outpoint_reply(msg2))
 		status_failed(STATUS_FAIL_HSM_IO,
diff --git a/hsmd/hsmd_wire.csv b/hsmd/hsmd_wire.csv
index 98e9b8149b47..979c0c1c2da9 100644
--- a/hsmd/hsmd_wire.csv
+++ b/hsmd/hsmd_wire.csv
@@ -92,7 +92,8 @@ msgtype,hsmd_setup_channel_reply,131
 # Sent when channel_ready or splice_locked are mutual.
 # Ensures that hsmd sees outpoint buried.
 msgtype,hsmd_sync_outpoint,32
-msgdata,hsmd_sync_outpoint,funding_outpoint,bitcoin_outpoint,
+msgdata,hsmd_sync_outpoint,funding_txid,bitcoin_txid,
+msgdata,hsmd_sync_outpoint,funding_txout,u16,
 
 # No value returned
 msgtype,hsmd_sync_outpoint_reply,132
diff --git a/hsmd/libhsmd.c b/hsmd/libhsmd.c
index 5e345f5b3c63..53cd78182e25 100644
--- a/hsmd/libhsmd.c
+++ b/hsmd/libhsmd.c
@@ -389,9 +389,10 @@ static u8 *handle_setup_channel(struct hsmd_client *c, const u8 *msg_in)
  * to ensure they are caught up when outpoints are freshly buried */
 static u8 *handle_sync_outpoint(struct hsmd_client *c, const u8 *msg_in)
 {
-	struct bitcoin_outpoint outpoint;
+	struct bitcoin_txid funding_txid;
+	u16 funding_txout;
 
-	if (!fromwire_hsmd_sync_outpoint(msg_in, &outpoint))
+	if (!fromwire_hsmd_sync_outpoint(msg_in, &funding_txid, &funding_txout))
 		return hsmd_status_malformed_request(c, msg_in);
 
 	/* Stub implementation */
diff --git a/openingd/dualopend.c b/openingd/dualopend.c
index d6900e831cb8..09a32b022180 100644
--- a/openingd/dualopend.c
+++ b/openingd/dualopend.c
@@ -431,7 +431,9 @@ static void check_mutual_channel_ready(struct state *state)
 	if (state->channel_ready[LOCAL] && state->channel_ready[REMOTE]) {
 		/* Make sure the hsmd agrees that this outpoint is
 		 * sufficiently buried. */
-		msg = towire_hsmd_sync_outpoint(NULL, &state->channel->funding);
+		msg = towire_hsmd_sync_outpoint(NULL,
+						&state->channel->funding.txid,
+						state->channel->funding.n);
 		wire_sync_write(HSM_FD, take(msg));
 		msg = wire_sync_read(tmpctx, HSM_FD);
 		if (!fromwire_hsmd_sync_outpoint_reply(msg))