diff --git a/multithread.js b/multithread.js
index d8d37c0..596ca10 100644
--- a/multithread.js
+++ b/multithread.js
@@ -10,7 +10,7 @@
 	}
 
 	function Multithread(threads) {
-		this.threads = Math.max(2, threads | 0);
+		this.threads = (typeof threads !== 'undefined') ? threads: (typeof navigator.hardwareConcurrency !== 'undefined') ? navigator.hardwareConcurrency : 2
 		this._queue = [];
 		this._queueSize = 0;
 		this._activeThreads = 0;
@@ -266,4 +266,4 @@
 
 	window['Multithread'] = Multithread;
 
-}();
\ No newline at end of file
+}();