diff --git a/bchain/coins/btc/bitcoinrpc.go b/bchain/coins/btc/bitcoinrpc.go
index 27494586..2e58ab72 100644
--- a/bchain/coins/btc/bitcoinrpc.go
+++ b/bchain/coins/btc/bitcoinrpc.go
@@ -122,6 +122,7 @@ func (b *BitcoinRPC) GetChainInfoAndInitializeMempool(bc bchain.BlockChain) (str
 
 // Initialize initializes BitcoinRPC instance.
 func (b *BitcoinRPC) Initialize() error {
+	b.ChainConfig.SupportsEstimateFee = false
 
 	chainName, err := b.GetChainInfoAndInitializeMempool(b)
 	if err != nil {
diff --git a/bchain/coins/myriad/myriadrpc.go b/bchain/coins/myriad/myriadrpc.go
index bc5f412e..f0bd201a 100644
--- a/bchain/coins/myriad/myriadrpc.go
+++ b/bchain/coins/myriad/myriadrpc.go
@@ -24,6 +24,7 @@ func NewMyriadRPC(config json.RawMessage, pushHandler func(bchain.NotificationTy
 		b.(*btc.BitcoinRPC),
 	}
 	s.RPCMarshaler = btc.JSONMarshalerV2{}
+	s.ChainConfig.SupportsEstimateFee = false
 
 	return s, nil
 }