diff --git a/reviewboard/cmdline/rbsite.py b/reviewboard/cmdline/rbsite.py
index a7158a1829268adf1fca00be7e9d38a5c7656778..8b79dc9bc976169f68614d7104f9b7cdc2ddb9f0 100755
--- a/reviewboard/cmdline/rbsite.py
+++ b/reviewboard/cmdline/rbsite.py
@@ -543,8 +543,12 @@ class Site(object):

         try:
             from django.core.management import execute_manager, get_commands
+            from reviewboard.extensions.base import get_extension_manager
             import reviewboard.settings

+            extensionmanager=get_extension_manager()
+            extensionmanager.load()
+
             if not params:
                 params = []