diff --git a/signals_unix.go b/signals_unix.go
index e2c767b..c642ea5 100644
--- a/signals_unix.go
+++ b/signals_unix.go
@@ -1,4 +1,5 @@
-// +build linux bsd darwin
+//go:build linux || bsd || darwin || freebsd
+// +build linux bsd darwin freebsd
 
 package asynq