diff --git a/apps/bootgatthrm/boot.js b/apps/bootgatthrm/boot.js
index 20ef6dde4..4677aa248 100644
--- a/apps/bootgatthrm/boot.js
+++ b/apps/bootgatthrm/boot.js
@@ -70,5 +70,5 @@
   }
 
   setupHRMAdvertising();
-  Bangle.on("HRM", function (hrm) { updateBLEHeartRate(hrm); });
+  Bangle.on("HRM", updateBLEHeartRate);
 })();