diff --git a/examples/heartrate-monitor/main.go b/examples/heartrate-monitor/main.go
index 74bb4a9..e4b4345 100644
--- a/examples/heartrate-monitor/main.go
+++ b/examples/heartrate-monitor/main.go
@@ -86,7 +86,7 @@ func main() {
 	println("found characteristic", char.UUID().String())
 
 	char.EnableNotifications(func(buf []byte) {
-		println("data:", uint8(buf[0]))
+		println("data:", uint8(buf[1]))
 	})
 
 	select {}