diff --git a/lib/bcoin/bip151.js b/lib/bcoin/bip151.js
index 54f4e798..91a81675 100644
--- a/lib/bcoin/bip151.js
+++ b/lib/bcoin/bip151.js
@@ -140,8 +140,8 @@ BIP151Stream.prototype.decrypt = function decrypt(data) {
   return this.aead.decrypt(data);
 };
 
-BIP151Stream.prototype.finish = function finish(data) {
-  this.tag = this.aead.finish(data);
+BIP151Stream.prototype.finish = function finish() {
+  this.tag = this.aead.finish();
   return this.tag;
 };