diff --git a/packages/effect-fc/src/Lens.ts b/packages/effect-fc/src/Lens.ts
index 50f1319..e8ef211 100644
--- a/packages/effect-fc/src/Lens.ts
+++ b/packages/effect-fc/src/Lens.ts
@@ -90,8 +90,7 @@ export const map: {
     <A, ER, EW, RR, RW, B>(
         get: (a: NoInfer<A>) => B,
         set: (a: NoInfer<A>, b: B) => NoInfer<A>,
-        self: Lens<A, ER, EW, RR, RW>,
-    ): Lens<B, ER, EW, RR, RW>
+    ): (self: Lens<A, ER, EW, RR, RW>) => Lens<B, ER, EW, RR, RW>
 } = Function.dual(3, <A, ER, EW, RR, RW, B>(
     self: Lens<A, ER, EW, RR, RW>,
     get: (a: NoInfer<A>) => B,
@@ -115,8 +114,7 @@ export const mapEffect: {
     <A, ER, EW, RR, RW, B, EGet = never, RGet = never, ESet = never, RSet = never>(
         get: (a: NoInfer<A>) => Effect.Effect<B, EGet, RGet>,
         set: (a: NoInfer<A>, b: B) => Effect.Effect<NoInfer<A>, ESet, RSet>,
-        self: Lens<A, ER, EW, RR, RW>,
-    ): Lens<B, ER | EGet, EW | ESet, RR | RGet, RW | RSet>
+    ): (self: Lens<A, ER, EW, RR, RW>) => Lens<B, ER | EGet, EW | ESet, RR | RGet, RW | RSet>
 } = Function.dual(3, <A, ER, EW, RR, RW, B, EGet = never, RGet = never, ESet = never, RSet = never>(
     self: Lens<A, ER, EW, RR, RW>,
     get: (a: NoInfer<A>) => Effect.Effect<B, EGet, RGet>,