diff --git a/cilium/cmd/monitor.go b/cilium/cmd/monitor.go
index <HASH>..<HASH> 100644
--- a/cilium/cmd/monitor.go
+++ b/cilium/cmd/monitor.go
@@ -62,7 +62,7 @@ var (
 )
 
 func lostEvent(lost *bpf.PerfEventLost, cpu int) {
-	fmt.Printf("Lost %d events\n", lost.Lost)
+	fmt.Printf("CPU %02d: Lost %d events\n", cpu, lost.Lost)
 }
 
 func receiveEvent(msg *bpf.PerfEventSample, cpu int) {
cmd/monitor: print CPU when losing events

We are already printing it in func receiveEvent(...). To be consistent
print it here as well, and maybe this will be useful for future
debugging.