diff --git a/src/devices/WindowsDevice.js b/src/devices/WindowsDevice.tsx
similarity index 85%
rename from src/devices/WindowsDevice.js
rename to src/devices/WindowsDevice.tsx
index b909899da..065dcd937 100644
--- a/src/devices/WindowsDevice.js
+++ b/src/devices/WindowsDevice.tsx
@@ -5,13 +5,12 @@
  * @format
  */
 
-import BaseDevice from './BaseDevice.tsx';
+import BaseDevice from './BaseDevice';
 
 export default class WindowsDevice extends BaseDevice {
-  os = 'Windows';
-
   constructor() {
     super('', 'physical', 'Windows');
+    this.os = 'Windows';
   }
 
   teardown() {}
diff --git a/src/dispatcher/desktopDevice.js b/src/dispatcher/desktopDevice.js
index 073afb091..5af9b64d6 100644
--- a/src/dispatcher/desktopDevice.js
+++ b/src/dispatcher/desktopDevice.js
@@ -9,7 +9,7 @@ import type {Store} from '../reducers/index.tsx';
 import type {Logger} from '../fb-interfaces/Logger.js';
 
 import MacDevice from '../devices/MacDevice.tsx';
-import WindowsDevice from '../devices/WindowsDevice';
+import WindowsDevice from '../devices/WindowsDevice.tsx';
 
 export default (store: Store, logger: Logger) => {
   let device;