diff --git a/libs/microbit-radio/radio.ts b/libs/microbit-radio/radio.ts
index 3ae2ea78..4106ca2c 100644
--- a/libs/microbit-radio/radio.ts
+++ b/libs/microbit-radio/radio.ts
@@ -1,3 +1,6 @@
+/**
+ * Communicate data using radio packets
+ */
 //% color=270 weight=34
 namespace radio {
     /**