--- a/ipc/moz.build
+++ b/ipc/moz.build
@@ -24,9 +24,12 @@ if CONFIG['MOZ_B2G_RIL'] or CONFIG['MOZ_
     DIRS += ['unixfd', 'unixsocket']
 
 if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gonk':
     DIRS += ['hal', 'keystore', 'netd']
 
 if CONFIG['MOZ_WIDGET_TOOLKIT'] != 'android':
     DIRS += ['contentproc']
 
+if CONFIG['OS_ARCH'] == 'WINNT':
+    DIRS += ['mscom']
+
 DIRS += ['app']

new file mode 100644
--- /dev/null
+++ b/ipc/mscom/moz.build
@@ -0,0 +1,15 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+EXPORTS.mozilla.mscom += [
+]
+
+UNIFIED_SOURCES += [
+]
+
+include('/ipc/chromium/chromium-config.mozbuild')
+
+FINAL_LIBRARY = 'xul'