diff --git a/src/UsefulBuf.c b/src/UsefulBuf.c
index ea6978c..045ca5c 100644
--- a/src/UsefulBuf.c
+++ b/src/UsefulBuf.c
@@ -27,6 +27,32 @@
 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ==============================================================================*/
 
+/*==============================================================================
+ Modifications beyond the version released on CAF are under the MIT license:
+ 
+ Copyright 2018 Laurence Lundblade
+ 
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+ ==============================================================================*/
+
 /*===================================================================================
  FILE:  UsefulBuf.c
  
diff --git a/src/qcbor_decode.c b/src/qcbor_decode.c
index 25c62f7..1d6fd58 100644
--- a/src/qcbor_decode.c
+++ b/src/qcbor_decode.c
@@ -27,6 +27,32 @@
 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ==============================================================================*/
 
+/*==============================================================================
+ Modifications beyond the version released on CAF are under the MIT license:
+ 
+ Copyright 2018 Laurence Lundblade
+ 
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+ ==============================================================================*/
+
 /*===================================================================================
  FILE:  qcbor_decode.c
  
diff --git a/src/qcbor_encode.c b/src/qcbor_encode.c
index 64a6b33..60e699f 100644
--- a/src/qcbor_encode.c
+++ b/src/qcbor_encode.c
@@ -27,6 +27,32 @@
 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ==============================================================================*/
 
+/*==============================================================================
+ Modifications beyond the version released on CAF are under the MIT license:
+ 
+ Copyright 2018 Laurence Lundblade
+ 
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+ ==============================================================================*/
+
 /*===================================================================================
  FILE:  qcbor_encode.c