diff --git a/src/config.js b/src/config.js
index 4a342194..19bd1ada 100644
--- a/src/config.js
+++ b/src/config.js
@@ -81,6 +81,8 @@ module.exports = {
   IS_PRODUCTION: IS_PRODUCTION,
   IS_TEST: IS_TEST,
 
+  OS_SYSARCH: is64BitOperatingSystem() ? 'x64' : 'ia32',
+
   POSTER_PATH: path.join(getConfigPath(), 'Posters'),
   ROOT_PATH: path.join(__dirname, '..'),
   STATIC_PATH: path.join(__dirname, '..', 'static'),
@@ -149,3 +151,32 @@ function isProduction () {
     return !/\/electron$/.test(process.execPath)
   }
 }
+
+/**
+ * Returns the operating system's CPU architecture. This is different than
+ * `process.arch` which returns the architecture the binary was compiled for.
+ *
+ * On Windows, the most reliable way to detect a 64-bit OS from within a 32-bit
+ * app is based on the presence of a WOW64 file: %SystemRoot%\SysNative.
+ *
+ * Background: https://twitter.com/feross/status/776949077208510464
+ */
+function is64BitOperatingSystem () {
+  // This is a 64-bit binary, so the OS clearly supports 64-bit apps
+  if (process.arch === 'x64') return true
+
+  let useEnv = false
+  try {
+    useEnv = !!(process.env.SYSTEMROOT && fs.statSync(process.env.SYSTEMROOT))
+  } catch (err) {}
+
+  let sysRoot = useEnv ? process.env.SYSTEMROOT : 'C:\\Windows'
+
+  // If %SystemRoot%\SysNative exists, we are in a WOW64 FS Redirected application.
+  let isWOW64 = false
+  try {
+    isWOW64 = !!fs.statSync(path.join(sysRoot, 'sysnative'))
+  } catch (err) {}
+
+  return isWOW64
+}
diff --git a/src/main/updater.js b/src/main/updater.js
index eab07a4c..b6d60966 100644
--- a/src/main/updater.js
+++ b/src/main/updater.js
@@ -11,7 +11,8 @@ const windows = require('./windows')
 
 const AUTO_UPDATE_URL = config.AUTO_UPDATE_URL +
   '?version=' + config.APP_VERSION +
-  '&platform=' + process.platform
+  '&platform=' + process.platform +
+  '&sysarch=' + config.OS_SYSARCH
 
 function init () {
   if (process.platform === 'linux') {
diff --git a/src/renderer/lib/telemetry.js b/src/renderer/lib/telemetry.js
index 3f720e8f..758b55a4 100644
--- a/src/renderer/lib/telemetry.js
+++ b/src/renderer/lib/telemetry.js
@@ -105,6 +105,7 @@ function getSystemInfo () {
     osPlatform: process.platform,
     osRelease: os.type() + ' ' + os.release(),
     architecture: os.arch(),
+    systemArchitecture: config.OS_SYSARCH,
     totalMemoryMB: roundPow2(os.totalmem() / (1 << 20)),
     numCores: os.cpus().length
   }