1 files changed, 5 insertions, 0 deletions
diff --git a/lib/README b/lib/README
index b42deea6..3f692baa 100644
--- a/lib/README
+++ b/lib/README
@@ -7,6 +7,11 @@ on recent versions of gcc, to support asynchronous notification of
 incoming data, and to not use SOF interrupts. See usb_serial.patch for
 the modifications.
 
+The cmsis directory contains code from:
+  https://github.com/ARM-software/CMSIS_5
+version 5.3.0 (49ac527aa7406cecbba46d4d3bdbc7f60c6c6d42). Contents
+taken from the CMSIS/Core/Include/ directory.
+
 The cmsis-sam3x8e directory contains code from the Arduino project:
   https://www.arduino.cc/
 version 1.5.1 (extracted on 20160608). It has been modified to compile