diff --git a/src/client/Client.js b/src/client/Client.js
index e04db3899..48589813a 100644
--- a/src/client/Client.js
+++ b/src/client/Client.js
@@ -1,3 +1,4 @@
+const os = require('os');
 const EventEmitter = require('events').EventEmitter;
 const mergeDefault = require('../util/MergeDefault');
 const Constants = require('../util/Constants');
@@ -216,7 +217,7 @@ class Client extends EventEmitter {
    * @readonly
    */
   get browser() {
-    return typeof window !== 'undefined';
+    return os.platform() === 'browser';
   }
 
   /**
diff --git a/src/client/websocket/WebSocketManager.js b/src/client/websocket/WebSocketManager.js
index 89136d276..da4d812bc 100644
--- a/src/client/websocket/WebSocketManager.js
+++ b/src/client/websocket/WebSocketManager.js
@@ -1,4 +1,4 @@
-const browser = typeof window !== 'undefined';
+const browser = require('os').platform() === 'browser';
 const EventEmitter = require('events').EventEmitter;
 const Constants = require('../../util/Constants');
 const convertArrayBuffer = require('../../util/ConvertArrayBuffer');
diff --git a/src/index.js b/src/index.js
index d6cdffc97..163819de7 100644
--- a/src/index.js
+++ b/src/index.js
@@ -46,4 +46,4 @@ module.exports = {
   Constants: require('./util/Constants'),
 };
 
-if (typeof window !== 'undefined') window.Discord = module.exports; // eslint-disable-line no-undef
+if (require('os').platform() === 'browser') window.Discord = module.exports; // eslint-disable-line no-undef
diff --git a/src/util/Constants.js b/src/util/Constants.js
index 3bfc67520..48f1cfec9 100644
--- a/src/util/Constants.js
+++ b/src/util/Constants.js
@@ -51,7 +51,7 @@ exports.DefaultOptions = {
    */
   ws: {
     large_threshold: 250,
-    compress: typeof window === 'undefined',
+    compress: require('os').platform() !== 'browser',
     properties: {
       $os: process ? process.platform : 'discord.js',
       $browser: 'discord.js',