diff --git a/lib/bcoin/mempool.js b/lib/bcoin/mempool.js
index fd094f3c..a3232b37 100644
--- a/lib/bcoin/mempool.js
+++ b/lib/bcoin/mempool.js
@@ -1729,7 +1729,7 @@ Mempool.prototype.memUsageBitcoind = function memUsageBitcoind(tx) {
     input = tx.inputs[i];
     mem += mallocUsage(input.witness.items.length);
     for (j = 0; j < input.witness.items.length; j++)
-      mem += mallocUsage(input.witness[j].items.length);
+      mem += mallocUsage(input.witness.items[j].length);
   }
 
   return mem;
diff --git a/lib/bcoin/miner.js b/lib/bcoin/miner.js
index 32d0559c..53c52fb6 100644
--- a/lib/bcoin/miner.js
+++ b/lib/bcoin/miner.js
@@ -570,14 +570,14 @@ MinerBlock.prototype.findNonce = function findNonce() {
 MinerBlock.prototype.__defineGetter__('hashes', function() {
   return new bn(this.iterations)
     .mul(utils.U32)
-    .addn(this.block.nonce);
+    .addn(this.block.nonce | 0);
 });
 
 MinerBlock.prototype.__defineGetter__('rate', function() {
   if (!this.block.nonce)
     return 0;
   // Calculate our terrible hashrate
-  return (this.block.nonce / (utils.now() - this.begin)) * 2 | 0;
+  return (this.block.nonce / (utils.now() - this.begin)) | 0;
 });
 
 /**
diff --git a/lib/bcoin/utils.js b/lib/bcoin/utils.js
index 6850aa09..6674e3bc 100644
--- a/lib/bcoin/utils.js
+++ b/lib/bcoin/utils.js
@@ -1838,6 +1838,7 @@ utils.readVarint2 = function readVarint2(data, off, big) {
     if (num >= 0x3fffffffffff) {
       assert(big, 'Number exceeds 2^53-1.');
       bnum = new bn(num);
+      num = 0;
     }
 
     if (bnum) {