diff --git a/lib/utils/encoding.js b/lib/utils/encoding.js
index ef477fb1..1000f83e 100644
--- a/lib/utils/encoding.js
+++ b/lib/utils/encoding.js
@@ -699,7 +699,7 @@ encoding.writeVarintN = function writeVarintN(dst, num, off) {
  */
 
 encoding.sizeVarintN = function sizeVarintN(num) {
-  enforce(!num.sign, off, 'Signed.');
+  enforce(!num.sign, 0, 'Signed.');
 
   if (num.gtn(0xffffffff))
     return 9;
@@ -814,7 +814,8 @@ encoding.sizeVarint2 = function sizeVarint2(num) {
  */
 
 encoding.readVarint2N = function readVarint2N(data, off) {
-  let num = new U64();
+  const num = new U64();
+
   let size = 0;
 
   for (;;) {
@@ -877,7 +878,7 @@ encoding.writeVarint2N = function writeVarint2N(dst, num, off) {
  */
 
 encoding.sizeVarint2N = function sizeVarint2N(num) {
-  enforce(!num.sign, off, 'Signed.');
+  enforce(!num.sign, 0, 'Signed.');
 
   if (num.hi === 0)
     return encoding.sizeVarint2(num.toInt());