diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index e607b0a2..83bf96e2 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -125,37 +125,36 @@ TX.prototype.input = TX.prototype.addInput;
 // tx._addInput(input)
 // tx._addInput({ hash: hash, index: index })
 // tx._addInput({ tx: tx, index: index })
-TX.prototype._addInput = function _addInput(obj, index) {
-  var options, hash, input, ex, i, prevout;
+TX.prototype._addInput = function _addInput(options, index) {
+  var input, ex, i, prevout;
 
-  if (obj instanceof TX)
-    options = { tx: obj, index: index };
-  else if (typeof obj === 'string' || utils.isBuffer(obj))
-    options = { hash: obj, index: index };
+  if (options instanceof TX)
+    options = { prevout: { tx: options, index: index } };
+  else if (typeof options === 'string' || utils.isBuffer(options))
+    options = { prevout: { hash: options, index: index } };
+  else if (!options.prevout)
+    options = { prevout: options, script: options.script, sequence: options.sequence };
   else
-    options = obj;
+    options = options;
 
-  prevout = options.prevout || options.out;
+  if (options.out)
+    options.prevout = options.out;
 
-  if (options.tx)
-    hash = options.tx.hash('hex');
-  else if (prevout)
-    hash = prevout.hash;
-  else
-    hash = options.hash;
+  if (options.seq != null)
+    options.sequence = options.seq;
 
-  if (typeof hash !== 'string')
-    hash = utils.toHex(hash);
+  if (options.prevout.tx)
+    options.prevout.hash = options.prevout.tx.hash('hex');
 
   input = bcoin.input({
     tx: this,
     prevout: {
-      tx: prevout ? prevout.tx : options.tx,
-      hash: hash,
-      index: prevout ? prevout.index : options.index
+      tx: options.prevout.tx,
+      hash: options.prevout.hash,
+      index: options.prevout.index
     },
     script: options.script,
-    sequence: options.sequence || options.seq
+    sequence: options.sequence
   });
 
   // Try modifying existing input first