diff --git a/lib/bcoin/adjustedtime.js b/lib/bcoin/adjustedtime.js
index f0bae290..00ab1dad 100644
--- a/lib/bcoin/adjustedtime.js
+++ b/lib/bcoin/adjustedtime.js
@@ -22,6 +22,7 @@ var assert = utils.assert;
  * @property {Array} samples
  * @property {Object} known
  * @property {Number} limit
+ * @property {Number} offset
  */
 
 function AdjustedTime(limit) {
@@ -36,6 +37,7 @@ function AdjustedTime(limit) {
   this.samples = [];
   this.known = {};
   this.limit = limit;
+  this.offset = 0;
   this._checked = false;
 }