diff --git a/Script.js b/Script.js
index a4ffbd2..c975538 100644
--- a/Script.js
+++ b/Script.js
@@ -36,7 +36,6 @@ function Script(buffer) {
   this.chunks = [];
   this.parse();
 }
-this.class = Script;
 
 Script.TX_UNKNOWN = TX_UNKNOWN;
 Script.TX_PUBKEY = TX_PUBKEY;
diff --git a/Transaction.js b/Transaction.js
index fe06563..f17eaeb 100644
--- a/Transaction.js
+++ b/Transaction.js
@@ -125,7 +125,6 @@ function Transaction(data) {
   }) : [];
   if (data.buffer) this._buffer = data.buffer;
 };
-this.class = Transaction;
 Transaction.In = TransactionIn;
 Transaction.Out = TransactionOut;