diff --git a/app/src/RoomClient.js b/app/src/RoomClient.js
index 04935c5..9e3ea4f 100644
--- a/app/src/RoomClient.js
+++ b/app/src/RoomClient.js
@@ -106,7 +106,7 @@ export default class RoomClient
 	}
 
 	constructor(
-		{ peerId, accessCode, device, useSimulcast, produce, forceTcp, displayName } = {})
+		{ peerId, accessCode, device, useSimulcast, produce, forceTcp, displayName, muted } = {})
 	{
 		if (!peerId)
 			throw new Error('Missing peerId');
@@ -138,6 +138,8 @@ export default class RoomClient
 		// Whether simulcast should be used.
 		this._useSimulcast = useSimulcast;
 
+		this._muted = muted;
+
 		// This device
 		this._device = device;
 
@@ -2112,7 +2114,8 @@ export default class RoomClient
 			if (this._produce)
 			{
 				if (this._mediasoupDevice.canProduce('audio'))
-					this.enableMic();
+					if (!this._muted)
+						this.enableMic();
 
 				if (joinVideo && this._mediasoupDevice.canProduce('video'))
 					this.enableWebcam();
diff --git a/app/src/index.js b/app/src/index.js
index 9ad3ef8..d601a31 100644
--- a/app/src/index.js
+++ b/app/src/index.js
@@ -105,6 +105,7 @@ function run()
 	const useSimulcast = parameters.get('simulcast') === 'true';
 	const forceTcp = parameters.get('forceTcp') === 'true';
 	const displayName = parameters.get('displayName');
+	const muted = parameters.get('muted') === 'true';
 	
 	// Get current device.
 	const device = deviceInfo();
@@ -117,7 +118,7 @@ function run()
 	);
 
 	roomClient = new RoomClient(
-		{ peerId, accessCode, device, useSimulcast, produce, forceTcp, displayName });
+		{ peerId, accessCode, device, useSimulcast, produce, forceTcp, displayName, muted });
 
 	global.CLIENT = roomClient;