diff --git a/src/components/SettingsModal.vue b/src/components/SettingsModal.vue
index a48ce51..3c9698d 100644
--- a/src/components/SettingsModal.vue
+++ b/src/components/SettingsModal.vue
@@ -56,6 +56,13 @@
 							<label class="error" v-if="errors['hostPort']">{{ errors['hostPort'] }}</label>
 						</transition>
 					</div>
+					<div class="control">
+						<label>SiaMux Port</label>
+						<input type="text" v-model="siaMuxPort" placeholder=":9983" />
+						<transition name="fade" mode="out-in" appear>
+							<label class="error" v-if="errors['siaMuxPort']">{{ errors['siaMuxPort'] }}</label>
+						</transition>
+					</div>
 					<div class="control">
 						<label>RPC Port</label>
 						<input type="text" v-model="rpcPort" placeholder=":9981" />
@@ -126,6 +133,7 @@ export default {
 			apiPassword: '',
 			dataPath: '',
 			hostPort: '',
+			siaMuxPort: '',
 			rpcPort: '',
 			notice: null,
 			errors: {},
@@ -146,6 +154,11 @@ export default {
 				hasErrors = true;
 			}
 
+			if (this.siaMuxPort && this.siaMuxPort.length > 0 && portRegex.exec(this.siaMuxPort) === null) {
+				errors['siaMuxPort'] = 'SiaMux port must match the format :9983';
+				hasErrors = true;
+			}
+
 			if (this.rpcPort && this.rpcPort.length > 0 && portRegex.exec(this.rpcPort) === null) {
 				errors['rpcPort'] = 'RPC port must match the format :9981';
 				hasErrors = true;
@@ -166,6 +179,7 @@ export default {
 			this.apiAgent = this.config.siad_api_agent;
 			this.apiPassword = this.config.siad_api_password;
 			this.dataPath = this.config.siad_data_path;
+			this.siaMuxPort = this.config.siad_siamux_port;
 			this.hostPort = this.config.siad_host_port;
 			this.rpcPort = this.config.siad_rpc_port;
 		},
@@ -179,6 +193,7 @@ export default {
 					siad_api_agent: this.apiAgent,
 					siad_api_password: this.apiPassword,
 					siad_data_path: this.dataPath,
+					siad_siamux_port: this.siaMuxPort,
 					siad_host_port: this.hostPort,
 					siad_rpc_port: this.rpcPort
 				};
@@ -252,6 +267,17 @@ export default {
 			if (this.changed)
 				this.notice = 'Changes will not take effect until daemon restart.';
 		},
+		siaMuxPort(val) {
+			this.validate();
+
+			if (this.changed)
+				return;
+
+			this.changed = (val !== this.config.siad_siamux_port);
+
+			if (this.changed)
+				this.notice = 'Changes will not take effect until daemon restart.';
+		},
 		hostPort(val) {
 			this.validate();
 
diff --git a/src/sia/daemon.js b/src/sia/daemon.js
index f4b411d..6e7e86d 100644
--- a/src/sia/daemon.js
+++ b/src/sia/daemon.js
@@ -17,6 +17,9 @@ function buildArgs(config) {
 	if (typeof config.siad_host_port === 'string' && config.siad_host_port.length > 0)
 		args.push('--host-addr', config.siad_host_port);
 
+	if (typeof config.siad_siamux_port === 'string' && config.siad_siamux_port.length > 0)
+		args.push('--siamux-addr', config.siad_siamux_port);
+
 	if (typeof config.siad_rpc_port === 'string' && config.siad_rpc_port.length > 0)
 		args.push('--rpc-addr', config.siad_rpc_port);
 
diff --git a/src/views/setup/DaemonOverrideStep.vue b/src/views/setup/DaemonOverrideStep.vue
index c3c1cb6..f887723 100755
--- a/src/views/setup/DaemonOverrideStep.vue
+++ b/src/views/setup/DaemonOverrideStep.vue
@@ -7,6 +7,10 @@
 			<h3>Do you want to change any Daemon flags?</h3>
 			<p>Some hosts use custom ports or change their API authentication. Change any of the daemon settings you need to. Leave blank to use the default value.</p>
 		</template>
+		<div class="control">
+			<label>SiaMux Port</label>
+			<input type="text" v-model="hostPort" placeholder=":9983" />
+		</div>
 		<div class="control">
 			<label>Host Port</label>
 			<input type="text" v-model="hostPort" placeholder=":9982" />
@@ -47,6 +51,7 @@ export default {
 	mounted() {
 		this.userAgent = this.config.siad_api_agent;
 		this.hostPort = this.config.siad_host_port;
+		this.siaMuxPort = this.config.siad_siamux_port;
 		this.rpcPort = this.config.siad_rpc_port;
 		this.apiAddr = this.config.siad_api_addr;
 	},
@@ -54,6 +59,7 @@ export default {
 		return {
 			userAgent: null,
 			hostPort: null,
+			siaMuxPort: null,
 			rpcPort: null,
 			apiAddr: null,
 			apiPassword: null
@@ -66,6 +72,7 @@ export default {
 				config: {
 					'siad_api_agent': this.userAgent,
 					'siad_host_port': this.hostPort,
+					'siad_siamux_port': this.siaMuxPort,
 					'siad_rpc_port': this.rpcPort,
 					'siad_api_addr': this.apiAddr,
 					'siad_api_password': this.apiPassword