diff --git a/config.js b/config.js
index d77e0ab71..1a89fcff5 100644
--- a/config.js
+++ b/config.js
@@ -13,6 +13,7 @@ var config = {
     bosh: '//jitsi-meet.example.com/http-bind', // FIXME: use xep-0156 for that
     desktopSharing: 'ext', // Desktop sharing method. Can be set to 'ext', 'webrtc' or false to disable.
     chromeExtensionId: 'diibjkoicjeejcmhdnailmkgecihlobk', // Id of desktop streamer Chrome extension
+    desktopSharingSources: ['screen', 'window'],
     minChromeExtVersion: '0.1', // Required version of Chrome extension
     enableRtpStats: true, // Enables RTP stats processing
     openSctp: true, // Toggle to enable/disable SCTP channels
diff --git a/desktopsharing.js b/desktopsharing.js
index 2e5e41895..5c4794578 100644
--- a/desktopsharing.js
+++ b/desktopsharing.js
@@ -125,7 +125,7 @@ function doGetStreamFromExtension(streamCallback, failCallback) {
     // Sends 'getStream' msg to the extension. Extension id must be defined in the config.
     chrome.runtime.sendMessage(
         config.chromeExtensionId,
-        { getStream: true},
+        { getStream: true, sources: config.desktopSharingSources },
         function (response) {
             if (!response) {
                 failCallback(chrome.runtime.lastError);