diff --git a/interpreters/toywasm/tmpl/license.in b/interpreters/toywasm/tmpl/license.in
index 90da07e10..2f7e88877 100644
--- a/interpreters/toywasm/tmpl/license.in
+++ b/interpreters/toywasm/tmpl/license.in
@@ -1,6 +1,8 @@
 /****************************************************************************
  * apps/interpreters/toywasm/FILENAME
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The