diff --git a/lib/internal/crypto/cipher.js b/lib/internal/crypto/cipher.js
index d5f6700fa270c1..8f5549feb14ec7 100644
--- a/lib/internal/crypto/cipher.js
+++ b/lib/internal/crypto/cipher.js
@@ -37,7 +37,7 @@ const { deprecate, normalizeEncoding } = require('internal/util');
 let StringDecoder;
 
 function rsaFunctionFor(method, defaultPadding) {
-  return function(options, buffer) {
+  return (options, buffer) => {
     const key = options.key || options;
     const padding = options.padding || defaultPadding;
     const passphrase = options.passphrase || null;