diff --git a/src/Builtin/Worlds.cs b/src/Builtin/Worlds.cs
index 463d9ee..abd7033 100644
--- a/src/Builtin/Worlds.cs
+++ b/src/Builtin/Worlds.cs
@@ -15,4 +15,8 @@
     {
         public EcsEventWorld(EcsPipeline pipeline = null) : base(pipeline) { }
     }
+    public sealed class EcsUIWorld : EcsWorld<EcsUIWorld>
+    {
+        public EcsUIWorld(EcsPipeline pipeline = null) : base(pipeline) { }
+    }
 }