diff --git a/src/core/meta-idle-monitor.c b/src/core/meta-idle-monitor.c
index 24e789407..ac38b04c0 100644
--- a/src/core/meta-idle-monitor.c
+++ b/src/core/meta-idle-monitor.c
@@ -949,6 +949,8 @@ on_bus_acquired (GDBusConnection *connection,
   for (iter = devices; iter; iter = iter->next)
     on_device_added (device_manager, iter->data, manager);
 
+  g_slist_free (devices);
+
   g_signal_connect_object (device_manager, "device-added",
                            G_CALLBACK (on_device_added), manager, 0);
   g_signal_connect_object (device_manager, "device-removed",