diff --git a/packages/effect-lens/src/Subscribable.ts b/packages/effect-lens/src/Subscribable.ts
index 6a04f69..149efa9 100644
--- a/packages/effect-lens/src/Subscribable.ts
+++ b/packages/effect-lens/src/Subscribable.ts
@@ -76,7 +76,7 @@ export const focusArrayAt: {
  */
 export const focusArrayLength = <A extends readonly any[], E, R>(
     self: Subscribable.Subscribable<A, E, R>,
-): Subscribable.Subscribable<number, E, R> => Subscribable.map(self, a => a.length)
+): Subscribable.Subscribable<number, E, R> => Subscribable.map(self, Array.length)
 
 /**
  * Narrows the focus to an indexed element of a readonly tuple.