diff --git a/lib/jwe/encrypt.js b/lib/jwe/encrypt.js
index 355f2c7a..ccd76ae2 100644
--- a/lib/jwe/encrypt.js
+++ b/lib/jwe/encrypt.js
@@ -190,7 +190,11 @@ class Encrypt {
     let aad
     if (this._aad) {
       final.aad = base64url.encode(this._aad)
-      aad = Buffer.concat([Buffer.from(final.protected || ''), Buffer.from('.'), Buffer.from(final.aad)])
+      aad = Buffer.concat([
+        Buffer.from(final.protected || ''),
+        Buffer.from('.'),
+        Buffer.from(final.aad)
+      ])
     } else {
       aad = Buffer.from(final.protected || '')
     }