diff --git a/lib/bcoin/bip151.js b/lib/bcoin/bip151.js
index 8ae82ea0..54f4e798 100644
--- a/lib/bcoin/bip151.js
+++ b/lib/bcoin/bip151.js
@@ -106,6 +106,7 @@ BIP151Stream.prototype.sequence = function sequence() {
   this.seq++;
   this.chacha.init(null, this.iv());
   this.aead.init(null, this.iv());
+  this.aead.aad(this.sid);
 };
 
 BIP151Stream.prototype.iv = function iv() {