packages/effect-fc/src/Lens.ts

@@ -41,7 +41,7 @@ export const make = <A, ER, RR, EW, RW>(
         ? options.modify
         : <B, E1 = never, R1 = never>(f: (a: A) => Effect.Effect<readonly [B, A], E1, R1>) =>
             Effect.flatMap(options.get, a =>
-                Effect.flatMap(f(a), ([b, next]) => Effect.map(options.set(next), () => b)
+                Effect.flatMap(f(a), ([b, next]) => Effect.as(options.set(next), b)
             )
         ),
 }, LensPrototype)