diff --git a/listen_unix.go b/listen_unix.go
index 50d9a66d..7011a1e6 100644
--- a/listen_unix.go
+++ b/listen_unix.go
@@ -119,7 +119,7 @@ func reusePort(network, address string, conn syscall.RawConn) error {
 		return nil
 	}
 	return conn.Control(func(descriptor uintptr) {
-		if err := unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1); err != nil {
+		if err := unix.SetsockoptInt(int(descriptor), unix.SOL_SOCKET, unixSOREUSEPORT, 1); err != nil {
 			Log().Error("setting SO_REUSEPORT",
 				zap.String("network", network),
 				zap.String("address", address),
diff --git a/listen_unix_setopt.go b/listen_unix_setopt.go
new file mode 100644
index 00000000..c9675f92
--- /dev/null
+++ b/listen_unix_setopt.go
@@ -0,0 +1,7 @@
+//go:build unix && !freebsd
+
+package caddy
+
+import "golang.org/x/sys/unix"
+
+const unixSOREUSEPORT = unix.SO_REUSEPORT
diff --git a/listen_unix_setopt_freebsd.go b/listen_unix_setopt_freebsd.go
new file mode 100644
index 00000000..06520540
--- /dev/null
+++ b/listen_unix_setopt_freebsd.go
@@ -0,0 +1,7 @@
+//go:build freebsd
+
+package caddy
+
+import "golang.org/x/sys/unix"
+
+const unixSOREUSEPORT = unix.SO_REUSEPORT_LB