diff --git a/libs/device/pxt.json b/libs/device/pxt.json
index 075902938f0..38c9ad97898 100644
--- a/libs/device/pxt.json
+++ b/libs/device/pxt.json
@@ -10,6 +10,7 @@
         "smallFood.ts",
         "bigFood.jres",
         "bigFood.ts",
+        "radio.d.ts",
         "sprites.duck.jres",
         "sprites.duck.ts",
         "sprites.castle.jres",
diff --git a/libs/device/radio.d.ts b/libs/device/radio.d.ts
new file mode 100644
index 00000000000..abaaa5bc6a0
--- /dev/null
+++ b/libs/device/radio.d.ts
@@ -0,0 +1,7 @@
+declare namespace radio {
+    /**
+     * Sends an event over radio to neigboring devices
+     */
+    //% blockHidden=1 shim=radio::raiseEvent
+    function raiseEvent(src: int32, value: int32): void;
+}
\ No newline at end of file