diff --git a/src/TraitExpression.ts b/src/TraitExpression.ts
index 2f71cef..5170012 100644
--- a/src/TraitExpression.ts
+++ b/src/TraitExpression.ts
@@ -44,7 +44,7 @@ export class TraitExpression<
     ) {
         return this.allTraits.reduce(
             (previous, trait) => trait.apply(previous),
-            this.superclass as Opaque<Superclass, TraitApplierSuperTag>,
+            this.superclass,
         ) as any
     }