--- a/testing/mozharness/configs/builds/releng_sub_mac_configs/64_add-on-devel.py
+++ b/testing/mozharness/configs/builds/releng_sub_mac_configs/64_add-on-devel.py
@@ -12,17 +12,17 @@ config = {
         'check-test',
 #        'generate-build-stats',
 #        'update',
     ],
     'stage_platform': 'macosx64-add-on-devel',
     'publish_nightly_en_US_routes': False,
     'build_type': 'add-on-devel',
     'platform_supports_post_upload_to_latest': False,
-    'objdir': 'obj-add-on-devel',
+    'objdir': 'obj-firefox',
     'enable_signing': False,
     'enable_talos_sendchange': False,
     #### 64 bit build specific #####
     'env': {
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'HG_SHARE_BASE_DIR': '/builds/hg-shared',
         'MOZ_OBJDIR': 'obj-firefox',