--- a/mozilla/b2g_config.py
+++ b/mozilla/b2g_config.py
@@ -581,17 +581,17 @@ PLATFORM_VARS = {
         'src_mozconfig': 'b2g/dev/config/mozconfigs/macosx64/mulet',
         'packageTests': True,
         'profiled_build': False,
         'builds_before_reboot': b2g_localconfig.BUILDS_BEFORE_REBOOT,
         'build_space': 12,
         'upload_symbols': False,
         'download_symbols': False,
         'slaves': SLAVES['macosx64-lion'],
-        'platform_objdir': "%s/i386" % OBJDIR,
+        'platform_objdir': OBJDIR,
         'stage_product': 'b2g',
         'stage_platform': 'macosx64-mulet',
         'update_platform': 'Darwin_x86_64-gcc3',
         'enable_shared_checkouts': True,
         'enable_nonunified_build': True,
         'env': {
             'MOZ_OBJDIR': OBJDIR,
             'HG_SHARE_BASE_DIR': '/builds/hg-shared',