diff --git a/tutorial/haxe/javascript.hxml b/tutorial/haxe/javascript.hxml
index b2b3876..b9a39bb 100644
--- a/tutorial/haxe/javascript.hxml
+++ b/tutorial/haxe/javascript.hxml
@@ -34,11 +34,11 @@
 #you modify your .hx files.
 -D source-map-content
 
+# libs
+-lib uuid
+
 #Generate source map and add debug information
 -debug
 
 #dead code elimination : remove unused code
-#"-dce no" : do not remove unused code
-#"-dce std" : remove unused code in the std lib (default)
-#"-dce full" : remove all unused code
 -dce full
\ No newline at end of file