diff --git a/net/gateway/gateway_darwin.go b/net/gateway/gateway_darwin.go
index 481d9bf..aad613d 100644
--- a/net/gateway/gateway_darwin.go
+++ b/net/gateway/gateway_darwin.go
@@ -5,11 +5,11 @@ import (
 	"os/exec"
 )
 
-func DiscoverGateway() (net.IP, string, error) {
+func DiscoverGateway() (ip net.IP, iface string, err error) {
 	routeCmd := exec.Command("netstat", "-rn")
 	output, err := routeCmd.CombinedOutput()
 	if err != nil {
-		return nil, err
+		return nil, "", err
 	}
 
 	return parseDarwinRouteGet(output)
diff --git a/net/gateway/gateway_freebsd.go b/net/gateway/gateway_freebsd.go
index 4942c27..035c22e 100644
--- a/net/gateway/gateway_freebsd.go
+++ b/net/gateway/gateway_freebsd.go
@@ -9,7 +9,7 @@ func DiscoverGateway() (ip net.IP, iface string, err error) {
 	routeCmd := exec.Command("netstat", "-rn")
 	output, err := routeCmd.CombinedOutput()
 	if err != nil {
-		return nil, err
+		return nil, "", err
 	}
 
 	return parseBSDSolarisNetstat(output)