diff --git a/lib/primitives/tx.js b/lib/primitives/tx.js
index 6bb7752d..d836a7e4 100644
--- a/lib/primitives/tx.js
+++ b/lib/primitives/tx.js
@@ -711,6 +711,15 @@ TX.prototype.signatureHashV1 = function signatureHashV1(index, prev, value, type
   bw.writeU32(input.sequence);
   bw.writeBytes(outputs);
   bw.writeU32(this.locktime);
+
+  var fOmitTxComment = !!(type & hashType.OMIT_TX_COMMENT);
+
+  if (this.version >= 2 && !fOmitTxComment) {
+    bw.writeVarBytes(Buffer.from(this.strFloData));
+  }
+
+  type &= ~hashType.OMIT_TX_COMMENT;
+  
   bw.writeU32(type);
 
   return digest.hash256(bw.render());