diff --git a/examples/cpp/modes.c b/examples/cpp/modes.c
index 01c92f3..fda26c3 100644
--- a/examples/cpp/modes.c
+++ b/examples/cpp/modes.c
@@ -1,3 +1,10 @@
+/*
+ * Source of file: https://github.com/watson/libmodes
+ * Author: Thomas Watson (@watson)
+ * Contact: w@tson.dk / https://twitter.com/wa7son
+ * License: BSD-2-Clause
+ */
+
 #include "modes.h"
 
 #define MODE_S_PREAMBLE_US 8       // microseconds
diff --git a/examples/cpp/modes.h b/examples/cpp/modes.h
index 358efa5..e1ece0b 100644
--- a/examples/cpp/modes.h
+++ b/examples/cpp/modes.h
@@ -1,3 +1,9 @@
+/*
+ * Source of file: https://github.com/watson/libmodes
+ * Author: Thomas Watson (@watson)
+ * Contact: w@tson.dk / https://twitter.com/wa7son
+ * License: BSD-2-Clause
+ */
 #ifndef __MODE_S_DECODER_H
 #define __MODE_S_DECODER_H