diff --git a/lib/bcoin/profiler.js b/lib/bcoin/profiler.js
index 8205cda1..b7c94898 100644
--- a/lib/bcoin/profiler.js
+++ b/lib/bcoin/profiler.js
@@ -15,10 +15,10 @@ var profiler = {};
 
 var utils = require('./utils');
 var assert = utils.assert;
-var fs, profiler;
+var fs, v8profiler;
 
 if (bcoin.profile && !bcoin.isBrowser) {
-  profiler = require('v8-' + 'profiler');
+  v8profiler = require('v8-' + 'profiler');
   fs = require('f' + 's');
 }
 
@@ -30,10 +30,10 @@ if (bcoin.profile && !bcoin.isBrowser) {
  */
 
 function Profile(name) {
-  if (profiler) {
+  if (v8profiler) {
     name = 'profile-' + (name ? name + '-' : '') + Profile.uid++;
     bcoin.debug('Starting CPU profile: %s', name);
-    this.profile = profiler.startProfiling(name, true);
+    this.profile = v8profiler.startProfiling(name, true);
     this.name = name;
   }
 }
@@ -45,7 +45,7 @@ Profile.uid = 0;
  */
 
 Profile.prototype.stopProfiling = function stopProfiling() {
-  if (!profiler)
+  if (!v8profiler)
     return;
 
   assert(this.profile);
@@ -58,7 +58,7 @@ Profile.prototype.stopProfiling = function stopProfiling() {
  */
 
 Profile.prototype.del = function del() {
-  if (!profiler)
+  if (!v8profiler)
     return;
 
   assert(this.profile);
@@ -76,7 +76,7 @@ Profile.prototype.save = function save(callback) {
 
   callback = utils.asyncify(callback);
 
-  if (!profiler)
+  if (!v8profiler)
     return callback();
 
   assert(this.profile);
@@ -106,10 +106,10 @@ Profile.prototype.save = function save(callback) {
  */
 
 function Snapshot(name) {
-  if (profiler) {
+  if (v8profiler) {
     name = 'snapshot-' + (name ? name + '-' : '') + Snapshot.uid++;
     bcoin.debug('Taking heap snapshot: %s', name);
-    this.snapshot = profiler.takeSnapshot(name);
+    this.snapshot = v8profiler.takeSnapshot(name);
     this.name = name;
   }
 }
@@ -123,7 +123,7 @@ Snapshot.uid = 0;
  */
 
 Snapshot.prototype.compare = function compare(other) {
-  if (!profiler)
+  if (!v8profiler)
     return;
 
   assert(this.snapshot);
@@ -137,7 +137,7 @@ Snapshot.prototype.compare = function compare(other) {
  */
 
 Snapshot.prototype.getHeader = function getHeader() {
-  if (!profiler)
+  if (!v8profiler)
     return;
 
   assert(this.snapshot);
@@ -150,7 +150,7 @@ Snapshot.prototype.getHeader = function getHeader() {
  */
 
 Snapshot.prototype.del = function del() {
-  if (!profiler)
+  if (!v8profiler)
     return;
 
   assert(this.snapshot);
@@ -168,7 +168,7 @@ Snapshot.prototype.save = function save(callback) {
 
   callback = utils.asyncify(callback);
 
-  if (!profiler)
+  if (!v8profiler)
     return callback();
 
   assert(this.snapshot);
@@ -233,7 +233,7 @@ profiler.snapshot = function snapshot(name, callback) {
       utils.mb(mem.rss - mem.heapTotal));
   }
 
-  if (!profiler)
+  if (!v8profiler)
     return callback ? utils.nextTick(callback) : null;
 
   snapshot = new Snapshot(name);