diff --git a/bitcoin/chainparams.c b/bitcoin/chainparams.c
index ac48ee5da..d26e77910 100644
--- a/bitcoin/chainparams.c
+++ b/bitcoin/chainparams.c
@@ -50,6 +50,7 @@ const struct chainparams networks[] = {
       */
      .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
      .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      /* "Lightning Charge Powers Developers & Blockstream Store" */
      .when_lightning_became_cool = 504500,
      .p2pkh_version = 0,
@@ -76,6 +77,7 @@ const struct chainparams networks[] = {
      .dust_limit = { 546 },
      .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
      .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .when_lightning_became_cool = 1,
      .p2pkh_version = 111,
      .p2sh_version = 196,
@@ -102,6 +104,7 @@ const struct chainparams networks[] = {
      .dust_limit = { 546 },
      .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
      .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .when_lightning_became_cool = 1,
      .p2pkh_version = 111,
      .p2sh_version = 196,
@@ -126,6 +129,7 @@ const struct chainparams networks[] = {
      .dust_limit = { 546 },
      .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
      .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .p2pkh_version = 111,
      .p2sh_version = 196,
      .testnet = true,
@@ -150,6 +154,7 @@ const struct chainparams networks[] = {
      .dust_limit = { 100000 },
      .max_funding = AMOUNT_SAT_INIT(60 * ((1 << 24) - 1)),
      .max_payment = AMOUNT_MSAT_INIT(60 * 0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .when_lightning_became_cool = 1320000,
      .p2pkh_version = 48,
      .p2sh_version = 50,
@@ -175,6 +180,7 @@ const struct chainparams networks[] = {
      .dust_limit = { 100000 },
      .max_funding = AMOUNT_SAT_INIT(60 * ((1 << 24) - 1)),
      .max_payment = AMOUNT_MSAT_INIT(60 * 0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .when_lightning_became_cool = 1,
      .p2pkh_version = 111,
      .p2sh_version = 58,
@@ -199,6 +205,7 @@ const struct chainparams networks[] = {
      .dust_limit = {546},
      .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
      .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .when_lightning_became_cool = 1,
      .p2pkh_version = 91,
      .p2sh_version = 75,
@@ -223,6 +230,7 @@ const struct chainparams networks[] = {
      .dust_limit = {546},
      .max_funding = AMOUNT_SAT_INIT((1 << 24) - 1),
      .max_payment = AMOUNT_MSAT_INIT(0xFFFFFFFFULL),
+     .max_supply = AMOUNT_SAT_INIT(2100000000000000),
      .when_lightning_became_cool = 1,
      .p2pkh_version = 57,
      .p2sh_version = 39,
diff --git a/bitcoin/chainparams.h b/bitcoin/chainparams.h
index f4e493de6..a8e74fe17 100644
--- a/bitcoin/chainparams.h
+++ b/bitcoin/chainparams.h
@@ -39,6 +39,8 @@ struct chainparams {
 	const struct amount_sat dust_limit;
 	const struct amount_sat max_funding;
 	const struct amount_msat max_payment;
+	/* Total coins in network */
+	const struct amount_sat max_supply;
 	const u32 when_lightning_became_cool;
 	const u8 p2pkh_version;
 	const u8 p2sh_version;
diff --git a/lightningd/dual_open_control.c b/lightningd/dual_open_control.c
index 9e593faff..8cd70683c 100644
--- a/lightningd/dual_open_control.c
+++ b/lightningd/dual_open_control.c
@@ -1849,11 +1849,12 @@ static void rbf_got_offer(struct subd *dualopend, const u8 *msg)
 	/* No error message known (yet) */
 	payload->err_msg = NULL;
 
-	payload->channel_max = chainparams->max_funding;
 	if (feature_negotiated(dualopend->ld->our_features,
 			       channel->peer->their_features,
 			       OPT_LARGE_CHANNELS))
-		payload->channel_max = AMOUNT_SAT(UINT_MAX);
+		payload->channel_max = chainparams->max_supply;
+	else
+		payload->channel_max = chainparams->max_funding;
 
 	tal_add_destructor2(dualopend, rbf_channel_remove_dualopend, payload);
 	plugin_hook_call_rbf_channel(dualopend->ld, NULL, payload);
@@ -1910,11 +1911,12 @@ static void accepter_got_offer(struct subd *dualopend,
 	payload->feerate_our_max = feerate_max(dualopend->ld, NULL);
 	payload->node_blockheight = get_block_height(dualopend->ld->topology);
 
-	payload->channel_max = chainparams->max_funding;
 	if (feature_negotiated(dualopend->ld->our_features,
 			       channel->peer->their_features,
 			       OPT_LARGE_CHANNELS))
-		payload->channel_max = AMOUNT_SAT(UINT64_MAX);
+		payload->channel_max = chainparams->max_supply;
+	else
+		payload->channel_max = chainparams->max_funding;
 
 	tal_add_destructor2(dualopend, openchannel2_remove_dualopend, payload);
 	plugin_hook_call_openchannel2(dualopend->ld, NULL, payload);