diff --git a/lib/blockchain/chain.js b/lib/blockchain/chain.js
index a3887899..303f2c10 100644
--- a/lib/blockchain/chain.js
+++ b/lib/blockchain/chain.js
@@ -1603,13 +1603,12 @@ Chain.prototype.verifyCheckpoint = function verifyCheckpoint(prev, hash) {
  */
 
 Chain.prototype.storeOrphan = function storeOrphan(block, flags, id) {
-  const hash = block.hash('hex');
   const height = block.getCoinbaseHeight();
-  let orphan = this.orphanPrev.get(block.prevBlock);
+  const orphan = this.orphanPrev.get(block.prevBlock);
 
   // The orphan chain forked.
   if (orphan) {
-    assert(orphan.block.hash('hex') !== hash);
+    assert(orphan.block.hash('hex') !== block.hash('hex'));
     assert(orphan.block.prevBlock === block.prevBlock);
 
     this.logger.warning(
@@ -1620,10 +1619,7 @@ Chain.prototype.storeOrphan = function storeOrphan(block, flags, id) {
   }
 
   this.limitOrphans();
-
-  orphan = new Orphan(block, flags, id);
-
-  this.addOrphan(orphan);
+  this.addOrphan(new Orphan(block, flags, id));
 
   this.logger.debug(
     'Storing orphan block: %s (%d).',
diff --git a/lib/utils/util.js b/lib/utils/util.js
index ffe898ef..f348c437 100644
--- a/lib/utils/util.js
+++ b/lib/utils/util.js
@@ -850,10 +850,12 @@ util.toFixed = function toFixed(num, exp) {
   }
 
   const mult = pow10(exp);
+
   let lo = num % mult;
-  const hi = (num - lo) / mult;
+  let hi = (num - lo) / mult;
 
   lo = lo.toString(10);
+  hi = hi.toString(10);
 
   while (lo.length < exp)
     lo = '0' + lo;