diff --git a/src/wrapper1.cpp b/src/wrapper1.cpp
index 315574e8..1ac0acbd 100644
--- a/src/wrapper1.cpp
+++ b/src/wrapper1.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// 
 // Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
 // Copyright 2008-2016 National ICT Australia (NICTA)
 // 
diff --git a/src/wrapper2.cpp b/src/wrapper2.cpp
index 0b544182..b16b9119 100644
--- a/src/wrapper2.cpp
+++ b/src/wrapper2.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// 
 // Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
 // Copyright 2008-2016 National ICT Australia (NICTA)
 //