diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index 8f4b0e33..93b189a1 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -2172,11 +2172,12 @@ TX.prototype.frameWitness = function frameWitness(writer) {
   for (i = 0; i < this.outputs.length; i++)
     this.outputs[i].toRaw(p);
 
-  for (i = 0; i < this.inputs.length; i++) {
-    start = p.written;
+  start = p.written;
+
+  for (i = 0; i < this.inputs.length; i++)
     this.inputs[i].witness.toRaw(p);
-    witnessSize += p.written - start;
-  }
+
+  witnessSize += p.written - start;
 
   p.writeU32(this.locktime);