--- a/configs/builds/releng_base_windows_64_builds.py
+++ b/configs/builds/releng_base_windows_64_builds.py
@@ -62,17 +62,17 @@ config = {
     #########################################################################
 
 
      #########################################################################
      ###### 64 bit specific ######
     'base_name': 'WINNT_6.1_x86-64_%(branch)s',
     'platform': 'win64',
     'stage_platform': 'win64',
-    'enable_max_vsize': True,
+    'enable_max_vsize': False,
     'env': {
         'MOZ_SYMBOLS_EXTRA_BUILDID': 'win64',
         'MOZ_AUTOMATION': '1',
         'HG_SHARE_BASE_DIR': 'C:/builds/hg-shared',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
         'PATH': 'C:/mozilla-build/python27;C:/mozilla-build/buildbotve/scripts;'
                 '%s' % (os.environ.get('path')),