diff --git a/webrtc/modules/desktop_capture/window_capturer_mac.mm b/webrtc/modules/desktop_capture/window_capturer_mac.mm
index f60be5d694..e69fc11d62 100644
--- a/webrtc/modules/desktop_capture/window_capturer_mac.mm
+++ b/webrtc/modules/desktop_capture/window_capturer_mac.mm
@@ -224,6 +224,9 @@ void WindowCapturerMac::Capture(const DesktopRegion& region) {
   CFRelease(cf_data);
   CFRelease(window_image);
 
+  frame->mutable_updated_region()->SetRect(
+      DesktopRect::MakeSize(frame->size()));
+
   callback_->OnCaptureCompleted(frame);
 
   if (full_screen_chrome_window_detector_)
diff --git a/webrtc/modules/desktop_capture/window_capturer_win.cc b/webrtc/modules/desktop_capture/window_capturer_win.cc
index a002185620..9f19faf273 100644
--- a/webrtc/modules/desktop_capture/window_capturer_win.cc
+++ b/webrtc/modules/desktop_capture/window_capturer_win.cc
@@ -251,6 +251,9 @@ void WindowCapturerWin::Capture(const DesktopRegion& region) {
 
   previous_size_ = frame->size();
 
+  frame->mutable_updated_region()->SetRect(
+      DesktopRect::MakeSize(frame->size()));
+
   if (!result) {
     LOG(LS_ERROR) << "Both PrintWindow() and BitBlt() failed.";
     frame.reset();
diff --git a/webrtc/modules/desktop_capture/window_capturer_x11.cc b/webrtc/modules/desktop_capture/window_capturer_x11.cc
index b641c93218..4945423c69 100755
--- a/webrtc/modules/desktop_capture/window_capturer_x11.cc
+++ b/webrtc/modules/desktop_capture/window_capturer_x11.cc
@@ -302,6 +302,9 @@ void WindowCapturerLinux::Capture(const DesktopRegion& region) {
   x_server_pixel_buffer_.CaptureRect(DesktopRect::MakeSize(frame->size()),
                                      frame);
 
+  frame->mutable_updated_region()->SetRect(
+      DesktopRect::MakeSize(frame->size()));
+
   callback_->OnCaptureCompleted(frame);
 }