--- a/browser/confvars.sh
+++ b/browser/confvars.sh
@@ -23,17 +23,16 @@ if test "$OS_ARCH" = "WINNT"; then
     fi
   fi
 fi
 
 # Enable building ./signmar and running libmar signature tests
 MOZ_ENABLE_SIGNMAR=1
 
 MOZ_SAFE_BROWSING=1
-MOZ_SERVICES_SYNC=1
 MOZ_SERVICES_CLOUDSYNC=1
 MOZ_APP_VERSION=$FIREFOX_VERSION
 MOZ_APP_VERSION_DISPLAY=$FIREFOX_VERSION_DISPLAY
 MOZ_EXTENSIONS_DEFAULT=" gio"
 # MOZ_APP_DISPLAYNAME will be set by branding/configure.sh
 # MOZ_BRANDING_DIRECTORY is the default branding directory used when none is
 # specified. It should never point to the "official" branding directory.
 # For mozilla-beta, mozilla-release, or mozilla-central repositories, use

--- a/browser/moz.configure
+++ b/browser/moz.configure
@@ -1,10 +1,11 @@
 # -*- 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/.
 
 imply_option('MOZ_PLACES', True)
 imply_option('MOZ_SERVICES_HEALTHREPORT', True)
+imply_option('MOZ_SERVICES_SYNC', True)
 
 include('../toolkit/moz.configure')

--- a/embedding/ios/confvars.sh
+++ b/embedding/ios/confvars.sh
@@ -3,9 +3,8 @@
 # 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/.
 
 MOZ_APP_NAME=geckoembed
 MOZ_APP_DISPLAYNAME=GeckoEmbed
 MOZ_UPDATER=
 MOZ_APP_VERSION=$MOZILLA_VERSION
 MOZ_EXTENSIONS_DEFAULT=" gio"
-MOZ_SERVICES_SYNC=1

--- a/embedding/ios/moz.configure
+++ b/embedding/ios/moz.configure
@@ -1,8 +1,9 @@
 # -*- 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/.
 
 imply_option('MOZ_PLACES', True)
 imply_option('MOZ_SERVICES_HEALTHREPORT', True)
+imply_option('MOZ_SERVICES_SYNC', True)

--- a/old-configure.in
+++ b/old-configure.in
@@ -6613,22 +6613,16 @@ MOZ_ARG_DISABLE_BOOL(ctypes,
 [  --disable-ctypes        Disable js-ctypes],
     BUILD_CTYPES=,
     BUILD_CTYPES=1)
 AC_SUBST(BUILD_CTYPES)
 if test "$BUILD_CTYPES"; then
     AC_DEFINE(BUILD_CTYPES)
 fi
 
-dnl Build Sync Services if required
-AC_SUBST(MOZ_SERVICES_SYNC)
-if test -n "$MOZ_SERVICES_SYNC"; then
-  AC_DEFINE(MOZ_SERVICES_SYNC)
-fi
-
 dnl Build Services/CloudSync if required
 AC_SUBST(MOZ_SERVICES_CLOUDSYNC)
 if test -n "$MOZ_SERVICES_CLOUDSYNC"; then
   AC_DEFINE(MOZ_SERVICES_CLOUDSYNC)
 fi
 
 dnl ========================================================
 if test "$MOZ_DEBUG" -o "$MOZ_DMD"; then

--- a/toolkit/moz.configure
+++ b/toolkit/moz.configure
@@ -404,14 +404,17 @@ project_flag('MOZ_SOCIAL',
              help='Build SocialAPI if required',
              default=True)
 
 project_flag('MOZ_SERVICES_HEALTHREPORT',
              help='Build Firefox Health Reporter Service',
              set_for_old_configure=True,
              set_as_define=True)
 
+project_flag('MOZ_SERVICES_SYNC',
+             help='Build Sync Services if required')
+
 # Miscellaneous programs
 # ==============================================================
 
 check_prog('TAR', ('gnutar', 'gtar', 'tar'))
 check_prog('UNZIP', ('unzip',))
 check_prog('ZIP', ('zip',))