diff --git a/CLOBBER b/CLOBBER
index 0b2c067ba0f1..3490a9ea7b6b 100644
--- a/CLOBBER
+++ b/CLOBBER
@@ -22,5 +22,5 @@
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Modified build files in third_party/libwebrtc - Bug 1766646 - Vendor libwebrtc from 435f279433
+Modified build files in third_party/libwebrtc - Bug 1766646 - Vendor libwebrtc from e820cef534
 
diff --git a/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build b/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
index 47934c29f701..7c9981b0b0bc 100644
--- a/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
+++ b/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
@@ -219,6 +219,7 @@ if CONFIG["OS_TARGET"] == "WINNT":
         "/third_party/libwebrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc",
         "/third_party/libwebrtc/modules/desktop_capture/win/screen_capturer_win_magnifier.cc",
         "/third_party/libwebrtc/modules/desktop_capture/win/selected_window_context.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/win/wgc_capture_session.cc",
         "/third_party/libwebrtc/modules/desktop_capture/win/window_capture_utils.cc",
         "/third_party/libwebrtc/modules/desktop_capture/win/window_capturer_win_gdi.cc",
         "/third_party/libwebrtc/modules/desktop_capture/win/window_capturer_win_wgc.cc",