diff --git a/lib/blockchain/chaindb.js b/lib/blockchain/chaindb.js
index c560c108..f8552544 100644
--- a/lib/blockchain/chaindb.js
+++ b/lib/blockchain/chaindb.js
@@ -1467,8 +1467,10 @@ ChainDB.prototype.saveUpdates = function saveUpdates() {
 
   this.logger.info('Saving %d state cache updates.', updates.length);
 
-  for (let update of updates)
-    this.put(layout.v(update.bit, update.hash), update.toRaw());
+  for (let update of updates) {
+    let {bit, hash} = update;
+    this.put(layout.v(bit, hash), update.toRaw());
+  }
 };
 
 /**
@@ -2122,9 +2124,9 @@ StateCache.prototype._init = function _init() {
   for (let i = 0; i < 32; i++)
     this.bits.push(null);
 
-  for (let deployment of this.network.deploys) {
-    assert(!this.bits[deployment.bit]);
-    this.bits[deployment.bit] = new Map();
+  for (let {bit} of this.network.deploys) {
+    assert(!this.bits[bit]);
+    this.bits[bit] = new Map();
   }
 };
 
@@ -2158,12 +2160,10 @@ StateCache.prototype.commit = function commit() {
 };
 
 StateCache.prototype.drop = function drop() {
-  let update, cache;
-
-  for (update of this.updates) {
-    cache = this.bits[update.bit];
+  for (let {bit, hash} of this.updates) {
+    let cache = this.bits[bit];
     assert(cache);
-    cache.delete(update.hash);
+    cache.delete(hash);
   }
 
   this.updates.length = 0;