diff --git a/Tun/Punchnet/SDLConfiguration.swift b/Tun/Punchnet/SDLConfiguration.swift
index 6cc91b4..8b5c2f2 100644
--- a/Tun/Punchnet/SDLConfiguration.swift
+++ b/Tun/Punchnet/SDLConfiguration.swift
@@ -49,7 +49,6 @@ public class SDLConfiguration {
     let version: Int
     
     let serverHost: String
-    let stunServers: [String]
 
     let stunSocketAddress: SocketAddress
 
@@ -75,9 +74,9 @@ public class SDLConfiguration {
                 exitNode: ExitNode?) {
         self.version = version
         self.serverHost = serverHost
-        self.stunServers = stunServers
-        self.stunSocketAddress = Self.makeStunSocketAddress(host: stunServers[0], port: 1365)
-        self.stunProbeSocketAddressArray = stunServers.map { stunServer in
+        let stunHosts = stunServers.isEmpty ? [serverHost] : stunServers
+        self.stunSocketAddress = Self.makeStunSocketAddress(host: stunHosts[0], port: 1365)
+        self.stunProbeSocketAddressArray = stunHosts.map { stunServer in
             [
                 Self.makeStunSocketAddress(host: stunServer, port: 1365),
                 Self.makeStunSocketAddress(host: stunServer, port: 1366)