diff --git a/lib/log4js-node.js b/lib/log4js-node.js
index 9c2b571..7fbe76c 100644
--- a/lib/log4js-node.js
+++ b/lib/log4js-node.js
@@ -330,7 +330,7 @@ Logger = function(name, level) {
 	this.level = Level.toLevel(level, log4js.levels.TRACE);
 };
 
-process.inherits(Logger, process.EventEmitter);
+sys.inherits(Logger, process.EventEmitter);
 
 Logger.prototype.setLevel = function(level) {
   this.level = Level.toLevel(level, log4js.levels.TRACE);