diff --git a/src/websocket.js b/src/websocket.js
index 576ea8a..4b356e6 100644
--- a/src/websocket.js
+++ b/src/websocket.js
@@ -39,7 +39,12 @@ WSSource.prototype.start = function() {
 	this.progress = 0;
 	this.established = false;
 	
-	this.socket = new WebSocket(this.url, this.options.protocols || null);
+	if (this.options.protocols) {
+		this.socket = new WebSocket(this.url, this.options.protocols);
+	} 
+	else {
+		this.socket = new WebSocket(this.url);
+	}
 	this.socket.binaryType = 'arraybuffer';
 	this.socket.onmessage = this.onMessage.bind(this);
 	this.socket.onopen = this.onOpen.bind(this);