--- a/configs/single_locale/linux.py
+++ b/configs/single_locale/linux.py
@@ -54,17 +54,17 @@ config = {
     "mbsdiff": "mbsdiff",
     "current_mar_filename": "firefox-%(version)s.%(locale)s.linux-i686.complete.mar",
     "complete_mar": "firefox-%(version)s.en-US.linux-i686.complete.mar",
     "localized_mar": "firefox-%(version)s.%(locale)s.linux-i686.complete.mar",
     "partial_mar": "firefox-%(version)s.%(locale)s.linux-i686.partial.%(from_buildid)s-%(to_buildid)s.mar",
     'installer_file': "firefox-%(version)s.en-US.linux-i686.tar.bz2",
 
     # Mock
-    'mock_target': 'mozilla-centos6-i386',
+    'mock_target': 'mozilla-centos6-x86_64',
     'mock_packages': [
         'autoconf213', 'python', 'mozilla-python27', 'zip', 'mozilla-python27-mercurial',
         'git', 'ccache', 'perl-Test-Simple', 'perl-Config-General',
         'yasm', 'wget',
         'mpfr',  # required for system compiler
         'xorg-x11-font*',  # fonts required for PGO
         'imake',  # required for makedepend!?!
         ### <-- from releng repo