diff --git a/src/TraitBuilder.ts b/src/TraitBuilder.ts
index 4c95b0a..420202c 100644
--- a/src/TraitBuilder.ts
+++ b/src/TraitBuilder.ts
@@ -82,7 +82,7 @@ export class TraitBuilder<
             this.traitStaticAbstract,
 
             apply as unknown as (Super: AbstractClass<object>) => (
-                Class<
+                Class<  // TODO: use abstract class instead
                     Simplify<
                         Omit<
                             InstanceType<ImplClassWithAbstract>,