diff --git a/libraries/ESP8266WiFi/src/WiFiServer.h b/libraries/ESP8266WiFi/src/WiFiServer.h
index be0604916..06f7d9c59 100644
--- a/libraries/ESP8266WiFi/src/WiFiServer.h
+++ b/libraries/ESP8266WiFi/src/WiFiServer.h
@@ -47,6 +47,7 @@ private:
 public:
   WiFiServer(IPAddress addr, uint16_t port);
   WiFiServer(uint16_t port);
+  virtual ~WiFiServer() {}
   WiFiClient available(uint8_t* status = NULL);
   bool hasClient();
   void begin();