diff --git a/lib/browser/desktop-capturer.js b/lib/browser/desktop-capturer.js
index bd264bab84..74acb82854 100644
--- a/lib/browser/desktop-capturer.js
+++ b/lib/browser/desktop-capturer.js
@@ -36,24 +36,20 @@ ipcMain.on(electronSources, (event, captureWindow, captureScreen, thumbnailSize,
 
 desktopCapturer.emit = (event, name, sources) => {
   // Receiving sources result from main process, now send them back to renderer.
-  const handledRequest = requestsQueue.shift(0)
+  const handledRequest = requestsQueue.shift()
   const handledWebContents = handledRequest.webContents
   const unhandledRequestsQueue = []
 
-  const result = () => {
-    const results = []
-    sources.forEach(source => {
-      results.push({
-        id: source.id,
-        name: source.name,
-        thumbnail: source.thumbnail.toDataURL()
-      })
-    })
-    return results
-  }
+  const result = sources.map(source => {
+    return {
+      id: source.id,
+      name: source.name,
+      thumbnail: source.thumbnail.toDataURL()
+    }
+  })
 
   if (handledWebContents != null) {
-    handledWebContents.send(capturerResult(handledRequest.id), result())
+    handledWebContents.send(capturerResult(handledRequest.id), result)
   }
 
   // Check the queue to see whether there is other same request. If has, handle
@@ -63,7 +59,7 @@ desktopCapturer.emit = (event, name, sources) => {
     const webContents = request.webContents
     if (deepEqual(handledRequest.options, request.options)) {
       if (webContents != null) {
-        webContents.send(capturerResult(request.id), result())
+        webContents.send(capturerResult(request.id), result)
       }
     } else {
       unhandledRequestsQueue.push(request)