diff --git a/util/btcctl/config.go b/util/btcctl/config.go
index 14689e20e..5d13c57c2 100644
--- a/util/btcctl/config.go
+++ b/util/btcctl/config.go
@@ -32,23 +32,31 @@ type config struct {
 	RPCCert       string `short:"c" long:"rpccert" description:"RPC server certificate chain for validation"`
 	NoTls         bool   `long:"notls" description:"Disable TLS"`
 	TestNet3      bool   `long:"testnet" description:"Connect to testnet"`
+	SimNet        bool   `long:"simnet" description:"Connect to the simulation test network"`
 	TlsSkipVerify bool   `long:"skipverify" description:"Do not verify tls certificates (not recommended!)"`
 	Wallet        bool   `long:"wallet" description:"Connect to wallet"`
 }
 
 // normalizeAddress returns addr with the passed default port appended if
 // there is not already a port specified.
-func normalizeAddress(addr string, useTestNet3, useWallet bool) string {
+func normalizeAddress(addr string, useTestNet3, useSimNet, useWallet bool) string {
 	_, _, err := net.SplitHostPort(addr)
 	if err != nil {
 		var defaultPort string
-		if useTestNet3 {
+		switch {
+		case useTestNet3:
 			if useWallet {
 				defaultPort = "18332"
 			} else {
 				defaultPort = "18334"
 			}
-		} else {
+		case useSimNet:
+			if useWallet {
+				defaultPort = "18554"
+			} else {
+				defaultPort = "18556"
+			}
+		default:
 			if useWallet {
 				defaultPort = "8332"
 			} else {
@@ -133,6 +141,22 @@ func loadConfig() (*flags.Parser, *config, []string, error) {
 		return parser, nil, nil, err
 	}
 
+	// Multiple networks can't be selected simultaneously.
+	numNets := 0
+	if cfg.TestNet3 {
+		numNets++
+	}
+	if cfg.SimNet {
+		numNets++
+	}
+	if numNets > 1 {
+		str := "%s: The testnet and simnet params can't be used " +
+			"together -- choose one of the two"
+		err := fmt.Errorf(str, "loadConfig")
+		fmt.Fprintln(os.Stderr, err)
+		return parser, nil, nil, err
+	}
+
 	// Override the RPC certificate if the --wallet flag was specified and
 	// the user did not specify one.
 	if cfg.Wallet && cfg.RPCCert == defaultRPCCertFile {
@@ -144,7 +168,8 @@ func loadConfig() (*flags.Parser, *config, []string, error) {
 
 	// Add default port to RPC server based on --testnet and --wallet flags
 	// if needed.
-	cfg.RPCServer = normalizeAddress(cfg.RPCServer, cfg.TestNet3, cfg.Wallet)
+	cfg.RPCServer = normalizeAddress(cfg.RPCServer, cfg.TestNet3,
+		cfg.SimNet, cfg.Wallet)
 
 	return parser, &cfg, remainingArgs, nil
 }