diff --git a/shell/model/homemodel.py b/shell/model/homemodel.py
index dac434a3..759c2b8c 100644
--- a/shell/model/homemodel.py
+++ b/shell/model/homemodel.py
@@ -107,15 +107,15 @@ class HomeModel(gobject.GObject):
         if self._active_activity:
             service = self._active_activity.get_service()
             if service:
-                service.set_active(False,
-                                   reply_handler=self._set_active_success,
-                                   error_handler=self._set_active_error)
+                service.SetActive(False,
+                                  reply_handler=self._set_active_success,
+                                  error_handler=self._set_active_error)
         if home_activity:
             service = home_activity.get_service()
             if service:
-                service.set_active(True,
-                                   reply_handler=self._set_active_success,
-                                   error_handler=self._set_active_error)
+                service.SetActive(True,
+                                  reply_handler=self._set_active_success,
+                                  error_handler=self._set_active_error)
 
         self._active_activity = home_activity
         self.emit('active-activity-changed', self._active_activity)
diff --git a/sugar/activity/activityservice.py b/sugar/activity/activityservice.py
index c9ee4827..f2b33945 100644
--- a/sugar/activity/activityservice.py
+++ b/sugar/activity/activityservice.py
@@ -56,6 +56,6 @@ class ActivityService(dbus.service.Object):
         self._activity = activity
 
     @dbus.service.method(_ACTIVITY_INTERFACE)
-    def set_active(self, active):
+    def SetActive(self, active):
         logging.debug('ActivityService.set_active: %s.' % active)
         self._activity.props.active = active