diff --git a/sugar/activity/Makefile.am b/sugar/activity/Makefile.am
index 87c42651..d11a3474 100644
--- a/sugar/activity/Makefile.am
+++ b/sugar/activity/Makefile.am
@@ -1,7 +1,7 @@
 sugardir = $(pythondir)/sugar/activity
 sugar_PYTHON =				\
 	__init__.py			\
-	Activity.py			\
+	activity.py			\
 	activityfactory.py		\
 	activityfactoryservice.py	\
 	activityhandle.py		\
diff --git a/sugar/activity/Activity.py b/sugar/activity/activity.py
similarity index 100%
rename from sugar/activity/Activity.py
rename to sugar/activity/activity.py