diff --git a/libs/microbit/music.ts b/libs/microbit/music.ts
index 2a87e741..da585165 100644
--- a/libs/microbit/music.ts
+++ b/libs/microbit/music.ts
@@ -1,4 +1,5 @@
 enum Note {
+    //% blockIdentity=music.noteFrequency
     C = 262,
     //% block=C#
     //% blockIdentity=music.noteFrequency