diff --git a/src/plugins/splash/script/script-lib-plymouth.c b/src/plugins/splash/script/script-lib-plymouth.c
index d578223e..97ac10ed 100644
--- a/src/plugins/splash/script/script-lib-plymouth.c
+++ b/src/plugins/splash/script/script-lib-plymouth.c
@@ -218,6 +218,7 @@ void script_lib_plymouth_destroy (script_lib_plymouth_data_t *data)
         script_obj_unref (data->script_display_message_func);
         script_obj_unref (data->script_hide_message_func);
         script_obj_unref (data->script_quit_func);
+        script_obj_unref (data->script_system_update_func);
         free (data);
 }