diff --git a/lib/transactions.js b/lib/transactions.js
index e348d25..c471986 100644
--- a/lib/transactions.js
+++ b/lib/transactions.js
@@ -6,6 +6,8 @@ var $ = bitcore.util.preconditions;
 var common = require('./common');
 var async = require('async');
 
+var MAXINT = 0xffffffff; // Math.pow(2, 32) - 1;
+
 function TxController(node) {
   this.node = node;
 }
@@ -213,7 +215,7 @@ TxController.prototype.transformInvTransaction = function(transaction) {
   }
 
   var isRBF = _.any(_.pluck(transaction.inputs, 'sequenceNumber'), function(seq) {
-    return seq !== 0xffffffff;
+    return seq < MAXINT - 1;
   });
 
   var transformed = {