diff --git a/network.go b/network.go
index 64be094f0..1139f6ad3 100644
--- a/network.go
+++ b/network.go
@@ -73,7 +73,7 @@ func networkSize(mask net.IPMask) int32 {
 
 func checkRouteOverlaps(networks []netlink.Route, dockerNetwork *net.IPNet) error {
 	for _, network := range networks {
-		if !network.Default && networkOverlaps(dockerNetwork, network.IPNet) {
+		if network.IPNet != nil && networkOverlaps(dockerNetwork, network.IPNet) {
 			return fmt.Errorf("Network %s is already routed: '%s'", dockerNetwork, network)
 		}
 	}
diff --git a/pkg/netlink/netlink_darwin.go b/pkg/netlink/netlink_darwin.go
index dcc60b676..298508ad1 100644
--- a/pkg/netlink/netlink_darwin.go
+++ b/pkg/netlink/netlink_darwin.go
@@ -5,7 +5,7 @@ import (
 	"net"
 )
 
-func NetworkGetRoutes() ([]*net.IPNet, error) {
+func NetworkGetRoutes() ([]Route, error) {
 	return nil, fmt.Errorf("Not implemented")
 }