diff --git a/server.go b/server.go
index c8423fc..301beaf 100644
--- a/server.go
+++ b/server.go
@@ -78,6 +78,9 @@ func (n Nameserver) String() string {
 type serverConfig map[string]interface{}
 
 func (sc serverConfig) Server(node, id string) (s *Server, err error) {
+	if len(sc) == 0 {
+		return
+	}
 	s = &Server{ID: id, Node: node}
 
 	for k := range sc {