diff --git a/src/lib/util/basic/either.ts b/src/lib/util/basic/either.ts
index e7e460f..d3f050c 100644
--- a/src/lib/util/basic/either.ts
+++ b/src/lib/util/basic/either.ts
@@ -1,6 +1,6 @@
 export type Left<E> = {readonly _tag: 'Left', readonly left: E}
 export type Right<A> = {readonly _tag: 'Right', readonly right: A}
-export type Either<E, A> = Left<E> | Right<A>
+export type Either<A, E> = Right<A> | Left<E>
 
 // Constructors
 export const left = <E>(e: E): Either<E, never> => ({