diff --git a/dns/server.go b/dns/server.go
index 49d4541a..db903349 100644
--- a/dns/server.go
+++ b/dns/server.go
@@ -60,6 +60,10 @@ func ReCreateServer(addr string, resolver *Resolver, mapper *ResolverEnhancer) {
 		address = ""
 	}
 
+	if addr == "" {
+		return
+	}
+
 	var err error
 	defer func() {
 		if err != nil {