diff --git a/package.json b/package.json
index c98faea..ed10751 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,8 @@
     "requireindex": "~1.0.0",
     "vec3": "0.1.3",
     "spiralloop": "1.0.2",
-    "node-dir": "~0.1.9"
+    "node-dir": "~0.1.9",
+    "uuid-1345": "~0.99.6"
   },
   "repository": {
     "type": "git",
diff --git a/src/lib/serverPlugins/login.js b/src/lib/serverPlugins/login.js
index bb7ee0d..8bfbd86 100644
--- a/src/lib/serverPlugins/login.js
+++ b/src/lib/serverPlugins/login.js
@@ -2,12 +2,18 @@ var path = require('path');
 var requireIndex = require('requireindex');
 var playerPlugins = requireIndex(path.join(__dirname,'..', 'playerPlugins'));
 var Player=require("../player");
+var UUID = require('uuid-1345');
 
 module.exports = inject;
 
 function inject(serv,options)
 {
   serv._server.on('login', function (client) {
+    if(!options["online-mode"])
+      client.uuid=UUID.v3({
+        namespace: UUID.namespace.dns,
+        name: client.username
+      });
     var player=new Player();
     player._client=client;
     for(var pluginName in playerPlugins) {