diff --git a/sugar/activity/bundlebuilder.py b/sugar/activity/bundlebuilder.py
index c6ae593b..bd0569e6 100644
--- a/sugar/activity/bundlebuilder.py
+++ b/sugar/activity/bundlebuilder.py
@@ -145,8 +145,9 @@ def _get_file_list(manifest):
 
 def _include_mo_in_bundle(bundle_zip):
     for langdir in os.listdir('locale'):
-        if os.path.isdir(os.path.join('locale', langdir)):
-            for filename in os.listdir(os.path.join('locale', langdir, 'LC_MESSAGES')):
+        if os.path.isdir(os.path.join('locale', langdir, 'LC_MESSAGES')):
+            for filename in os.listdir(os.path.join('locale', langdir,
+                                                    'LC_MESSAGES')):
                 if filename.endswith('.mo'):
                     arcname = os.path.join(_get_bundle_name() + '.activity',
                                            'locale', langdir, 'LC_MESSAGES',