diff --git a/lib/xmpp-client/client.js b/lib/xmpp-client/client.js
index ec0a617..b3b9e00 100644
--- a/lib/xmpp-client/client.js
+++ b/lib/xmpp-client/client.js
@@ -34,7 +34,7 @@ var Client = function(params) {
 				jabber._debug('IQ result: ' + stanza);
 				jabber.emit('iqResult', stanza.attrs.id, stanza);
 			} else {
-				this._debug('IQ: ' + stanza);
+				jabber._debug('IQ: ' + stanza);
 				jabber.emit('iq', stanza);
 			}
 		}
@@ -110,8 +110,8 @@ Client.prototype.iq = function(iq, callback) {
 	this.xmpp.send(new xmpp.Element('iq', {type:"get", id: n}).cnode(iq).tree());
 };
 
-Client.prototype.presence = function() {
-	this.xmpp.send(new xmpp.Element('presence', {type: 'available'}).tree());
+Client.prototype.presence = function(type) {
+	this.xmpp.send(new xmpp.Element('presence', (type != null) ? {type: type} : {}).tree());
 };
 
 Client.prototype.disconnect = function() {