diff --git a/lib/bitcoind.js b/lib/bitcoind.js
index 7560464c..4b48e2a7 100644
--- a/lib/bitcoind.js
+++ b/lib/bitcoind.js
@@ -342,6 +342,15 @@ function Transaction(data) {
     }
   });
 
+  if (this.isCoinbase()) {
+    this.vin[0].txid = Array(64 + 1).join('0');
+    this.vin[0].vout = 0;
+    this.vin[0].scriptSig = {
+      asm: null,
+      hex: this.vin[0].coinbase
+    };
+  }
+
   this.toHex();
 }
 
@@ -378,7 +387,7 @@ Transaction.prototype.computePriority = function() {
 };
 
 Transaction.prototype.isCoinbase = function() {
-  ;
+  return this.vin.length === 1 && this.vin[0].coinbase;
 };
 
 Transaction.prototype.equal = function() {
@@ -422,9 +431,6 @@ Transaction.toBinary = function(tx) {
       off += utils.copy(s, p, off, true);
 
       off += utils.writeU32(p, input.sequence, off);
-
-      // off += utils.copy(new bn(input.coinbase, 'hex').toArray(), p, off, true);
-      // off += utils.writeU32(p, input.sequence, off);
     } else {
       off += utils.copy(new bn(input.txid, 'hex').toArray(), p, off, true);
       off += utils.writeU32(p, input.vout, off);