diff --git a/src/Result/Result.ts b/src/Result/Result.ts
index 7c576ac..c103e80 100644
--- a/src/Result/Result.ts
+++ b/src/Result/Result.ts
@@ -3,11 +3,11 @@ import { Option } from '../Option'
 export declare type Ok<T> = {
   readonly TAG: 0
   readonly _0: T
-} & { __: 'Ok' }
+}
 export declare type Error<T> = {
   readonly TAG: 1
   readonly _0: T
-} & { __: 'Error' }
+}
 
 export declare type Result<A, B> = Ok<A> | Error<B>
 
diff --git a/src/Result/index.ts b/src/Result/index.ts
index df0206d..4ab667a 100644
--- a/src/Result/index.ts
+++ b/src/Result/index.ts
@@ -2,11 +2,11 @@ import { Option } from '../Option'
 export declare type Ok<T> = {
   readonly TAG: 0
   readonly _0: T
-} & { __: 'Ok' }
+}
 export declare type Error<T> = {
   readonly TAG: 1
   readonly _0: T
-} & { __: 'Error' }
+}
 
 export declare type Result<A, B> = Ok<A> | Error<B>