diff --git a/src/sugar/bundle/activitybundle.py b/src/sugar/bundle/activitybundle.py
index 94c44b0e..56c04875 100644
--- a/src/sugar/bundle/activitybundle.py
+++ b/src/sugar/bundle/activitybundle.py
@@ -35,6 +35,7 @@ from sugar.bundle.bundle import Bundle, \
 from sugar.bundle.bundleversion import NormalizedVersion
 from sugar.bundle.bundleversion import InvalidVersionError
 
+
 class ActivityBundle(Bundle):
     """A Sugar activity bundle