diff --git a/pkg/registry/core/service/rest.go b/pkg/registry/core/service/rest.go
index ba323314237..2da856e1e0a 100644
--- a/pkg/registry/core/service/rest.go
+++ b/pkg/registry/core/service/rest.go
@@ -556,6 +556,8 @@ func shouldAssignNodePorts(service *api.Service) bool {
 		return true
 	case api.ServiceTypeClusterIP:
 		return false
+	case api.ServiceTypeExternalName:
+		return false
 	default:
 		glog.Errorf("Unknown service type: %v", service.Spec.Type)
 		return false