diff --git a/lib/xmpp-client/client.js b/lib/xmpp-client/client.js
index ede1794..8b44bb2 100644
--- a/lib/xmpp-client/client.js
+++ b/lib/xmpp-client/client.js
@@ -128,7 +128,7 @@ var Client = function(params, callback) {
 		jabber.resultIq(stanza, new xmpp.Element('query', {xmlns:'jabber:iq:version'})
 			.c('name').t('node-xmpp-client').up()
 			.c('version').t('0.0.1').up()
-			.c('os').t('mac').up()
+			.c('os').t(process.platform).up()
 			.tree()
 		);
 	});