diff --git a/cmd/livekit-load-tester/ulimit_unix.go b/cmd/livekit-load-tester/ulimit_unix.go
index 9f4d508b..0ec0d754 100644
--- a/cmd/livekit-load-tester/ulimit_unix.go
+++ b/cmd/livekit-load-tester/ulimit_unix.go
@@ -1,3 +1,6 @@
+//go:build linux || darwin
+// +build linux darwin
+
 package main
 
 import (