diff --git a/sugar/activity/Makefile.am b/sugar/activity/Makefile.am
index 1a0aec49..12b09075 100644
--- a/sugar/activity/Makefile.am
+++ b/sugar/activity/Makefile.am
@@ -4,4 +4,5 @@ sugar_PYTHON =			\
 	Activity.py		\
 	ActivityFactory.py	\
 	bundle.py		\
+	bundlebuilder.py	\
 	bundleregistry.py