diff --git a/src/TraitExpressionBuilder.ts b/src/TraitExpressionBuilder.ts
index d1fdeec..4e222ee 100644
--- a/src/TraitExpressionBuilder.ts
+++ b/src/TraitExpressionBuilder.ts
@@ -48,7 +48,7 @@ type BuildTraitExpression<
 )
 
 
-class TraitExpressionBuilder<
+export class TraitExpressionBuilder<
     Superclass   extends AbstractClass<object>,
     const Traits extends Trait<any, any, any, any>[],
 > {
diff --git a/src/lib.ts b/src/lib.ts
index 9426d7e..becb821 100644
--- a/src/lib.ts
+++ b/src/lib.ts
@@ -1,4 +1,4 @@
 export { Trait, TraitClass, TraitConcreteClass, TraitInstance, TraitStaticMembers, TraitTuple } from "./Trait"
 export { TraitBuilder, trait } from "./TraitBuilder"
 export { Implements, ImplementsStatic, TraitExpression, TraitExpressionClass, TraitExpressionConcreteClass, TraitExpressionInstance, TraitExpressionStaticMembers } from "./TraitExpression"
-export { expression } from "./TraitExpressionBuilder"
+export { TraitExpressionBuilder, expression } from "./TraitExpressionBuilder"